base(redirected from pyrimidine b)
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These nouns all pertain to what underlies and supports. Base is used broadly in both literal and figurative contexts: the wide base of the pyramid; a party seeking to expand its power base.
Basis is used in a nonphysical sense: "Healthy scepticism is the basis of all accurate observation" (Arthur Conan Doyle).
Foundation often stresses firmness of support for something of relative magnitude: "Our flagrant disregard for the law attacks the foundation of this society" (Peter D. Relic).
Ground is used figuratively, especially in the plural, to mean a justifiable reason: grounds for divorce.
Groundwork usually has the sense of a necessary preliminary: "It [the Universal Declaration of Human Rights] has laid the groundwork for the world's war crimes tribunals" (Hillary Rodham Clinton).
These adjectives mean lacking in dignity or falling short of the standards befitting humans. Base suggests a contemptible, mean-spirited, or selfish lack of human decency: "that liberal obedience, without which your army would be a base rabble" (Edmund Burke).
Something low violates standards of morality, ethics, or propriety: low cunning; a low trick. Abject means degrading or miserable: abject failure; abject poverty. Ignoble means lacking noble qualities, such as elevated moral character: "For my part I think it a less evil that some criminals should escape than that the government should play an ignoble part" (Oliver Wendell Holmes, Jr.).
Mean suggests pettiness, spite, or stinginess: "Never ascribe to an opponent motives meaner than your own" (J.M. Barrie).
Sordid suggests foul, repulsive degradation: "It is through art ... that we can shield ourselves from the sordid perils of actual existence" (Oscar Wilde).
n., adj., v. based, bas•ing. n.
adj. bas•er, bas•est.
2. An area or locality containing installations which provide logistic or other support. See also establishment.
3. (DOD only) Home airfield or home carrier. See also base of operations; facility.
These words are both usually pronounced /beɪs/.
A bass is a male singer who can sing very low notes.
A bass saxophone, guitar, or other musical instrument is one that has a lower range of notes than other instruments of its kind.
Note that this sense of the word bass is pronounced /bæs/.
The base of something is its lowest edge or part.
Past participle: based
|Noun||1.||base - installation from which a military force initiates operations; "the attack wiped out our forward bases"|
army base - a large base of operations for an army
firebase - an artillery base to support advancing troops
military installation - any facility servicing military forces
navy base - base of operations for a naval fleet
rocket base - a military base for rocket missiles
|2.||base - lowest support of a structure; "it was built on a base of solid rock"; "he stood at the foot of the tower"|
bed - a foundation of earth or rock supporting a road or railroad track; "the track bed had washed away"
raft foundation - a foundation (usually on soft ground) consisting of an extended layer of reinforced concrete
structure, construction - a thing constructed; a complex entity constructed of many parts; "the structure consisted of a series of arches"; "she wore her hair in an amazing construction of whirls and ribbons"
support - supporting structure that holds up or provides a foundation; "the statue stood on a marble support"
|3.||base - a place that the runner must touch before scoring; "he scrambled to get back to the bag"|
baseball diamond, infield, diamond - the area of a baseball field that is enclosed by 3 bases and home plate
baseball equipment - equipment used in playing baseball
first base - the base that must be touched first by a base runner in baseball
home base, home plate, plate, home - (baseball) base consisting of a rubber slab where the batter stands; it must be touched by a base runner in order to score; "he ruled that the runner failed to touch home"
second base - the base that must be touched second by a base runner in baseball
|4.||base - the bottom or lowest part; "the base of the mountain"|
|5.||base - (anatomy) the part of an organ nearest its point of attachment; "the base of the skull"|
bottom - the lowest part of anything; "they started at the bottom of the hill"
|6.||base - a lower limit; "the government established a wage floor"|
control - the economic policy of controlling or limiting or curbing prices or wages etc.; "they wanted to repeal all the legislation that imposed economic controls"
price floor - floor below which prices are not allowed to fall; "the government used price supports to maintain the price floor"
wage floor - floor below which wages are not allowed to fall
|7.||base - the fundamental assumptions from which something is begun or developed or calculated or explained; "the whole argument rested on a basis of conjecture"|
explanation - thought that makes something comprehensible
meat and potatoes - the fundamental part; "successful negotiation is the meat and potatoes of arbitration"
|8.||base - a support or foundation; "the base of the lamp"|
brass monkey - a metal stand that formerly held cannon balls on sailing ships
staddle - a base or platform on which hay or corn is stacked
support - any device that bears the weight of another thing; "there was no place to attach supports for a shelf"
trivet - a stand with short feet used under a hot dish on a table
trivet - a three-legged metal stand for supporting a cooking vessel in a hearth
|9.||base - a phosphoric ester of a nucleoside; the basic structural unit of nucleic acids (DNA or RNA)|
base pair - one of the pairs of chemical bases joined by hydrogen bonds that connect the complementary strands of a DNA molecule or of an RNA molecule that has two strands; the base pairs are adenine with thymine and guanine with cytosine in DNA and adenine with uracil and guanine with cytosine in RNA
adenosine monophosphate, adenylic acid, AMP - a nucleotide found in muscle cells and important in metabolism; reversibly convertible to ADP and ATP
adenosine triphosphate, ATP - a nucleotide derived from adenosine that occurs in muscle tissue; the major source of energy for cellular reactions
deoxyadenosine monophosphate, A - one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
deoxycytidine monophosphate, C - one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
deoxyguanosine monophosphate, G - one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
deoxythymidine monophosphate, T - one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
ester - formed by reaction between an acid and an alcohol with elimination of water
muton - the smallest unit of DNA where a mutation can occur
|10.||base - any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water; "bases include oxides and hydroxides of metals and ammonia"|
pyridine - a toxic colorless flammable liquid organic base with a disagreeable odor; usually derived from coal
purine - a colorless crystalline organic base containing nitrogen; the parent compound of various biologically important substances
purine - any of several bases that are derivatives of purine
chemical compound, compound - (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
pyrimidine - any of several basic compounds derived from pyrimidine
|11.||base - the bottom side of a geometric figure from which the altitude can be constructed; "the base of the triangle"|
flank - a subfigure consisting of a side of something
|12.||base - the most important or necessary part of something; "the basis of this drink is orange juice"|
|13.||base - (numeration system) the positive integer that is equivalent to one in the next higher counting place; "10 is the radix of the decimal system"|
number representation system, number system, numeration system, system of numeration - any notation for the representation of numbers
number - a concept of quantity involving zero and units; "every number has a unique position in the sequence"
|14.||base - the place where you are stationed and from which missions start and end|
location - a point or extent in space
|15.||Base - a terrorist network intensely opposed to the United States that dispenses money and logistical support and training to a wide variety of radical Islamic terrorist groups; has cells in more than 50 countries|
act of terrorism, terrorism, terrorist act - the calculated use of violence (or the threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimidation or coercion or instilling fear
Afghanistan, Islamic State of Afghanistan - a mountainous landlocked country in central Asia; bordered by Iran to the west and Russia to the north and Pakistan to the east and south; "Soviet troops invaded Afghanistan in 1979"
|16.||base - (linguistics) the form of a word after all affixes are removed; "thematic vowels are part of the stem"|
linguistics - the scientific study of language
|17.||base - the stock of basic facilities and capital equipment needed for the functioning of a country or area; "the industrial base of Japan"|
communication equipment, communication system - facility consisting of the physical plants and equipment for disseminating information
gas system - facility (plant and equipment) for providing natural-gas service
main - a principal pipe in a system that distributes water or gas or electricity or that collects sewage
penal facility, penal institution - an institution where persons are confined for punishment and to protect the public
power grid, power system, grid - a system of high tension cables by which electrical power is distributed throughout a region
public works - structures (such as highways or schools or bridges or docks) constructed at government expense for public use
school system - establishment including the plant and equipment for providing education from kindergarten through high school
sewage system, sewage works, sewer system - facility consisting of a system of sewers for carrying off liquid and solid sewage
transportation, transportation system, transit - a facility consisting of the means and equipment necessary for the movement of passengers or goods
water supply, water system, water - a facility that provides a source of water; "the town debated the purification of the water supply"; "first you have to cut off the water"
|18.||base - the principal ingredient of a mixture; "glycerinated gelatin is used as a base for many ointments"; "he told the painter that he wanted a yellow base with just a hint of green"; "everything she cooked seemed to have rice as the base"|
ingredient - a component of a mixture or compound
|19.||base - a flat bottom on which something is intended to sit; "a tub should sit on its own base"|
box - a (usually rectangular) container; may have a lid; "he rummaged through a box of spare parts"
lamp - a piece of furniture holding one or more electric light bulbs
vessel - an object used as a container (especially for liquids)
|20.||base - (electronics) the part of a transistor that separates the emitter from the collector|
electrode - a conductor used to make electrical contact with some part of a circuit
electronic transistor, junction transistor, transistor - a semiconductor device capable of amplification
electronics - the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices
|Verb||1.||base - use as a basis for; found on; "base a claim on some observation"|
build - found or ground; "build a defense on nothing but the accused person's reputation"
|2.||base - situate as a center of operations; "we will base this project in the new lab"|
|3.||base - use (purified cocaine) by burning it and inhaling the fumes|
|Adj.||1.||base - serving as or forming a base; "the painter applied a base coat followed by two finishing coats"|
basic - pertaining to or constituting a base or basis; "a basic fact"; "the basic ingredients"; "basic changes in public opinion occur because of changes in priorities"
|2.||base - of low birth or station (`base' is archaic in this sense); "baseborn wretches with dirty faces"; "of humble (or lowly) birth"|
lowborn - of humble birth or origins; "a topsy-turvy society of lowborn rich and blue-blooded poor"
|3.||base - (used of metals) consisting of or alloyed with inferior metal; "base coins of aluminum"; "a base metal"|
inferior - of low or inferior quality
|4.||base - not adhering to ethical or moral principles; "base and unpatriotic motives"; "a base, degrading way of life"; "cheating is dishonorable"; "they considered colonialism immoral"; "unethical practices in handling public funds"|
wrong - contrary to conscience or morality or law; "it is wrong for the rich to take advantage of the poor"; "cheating is wrong"; "it is wrong to lie"
|5.||base - having or showing an ignoble lack of honor or morality; "that liberal obedience without which your army would be a base rabble"- Edmund Burke; "taking a mean advantage"; "chok'd with ambition of the meaner sort"- Shakespeare; "something essentially vulgar and meanspirited in politics"|
ignoble - completely lacking nobility in character or quality or purpose; "something cowardly and ignoble in his attitude"; "I think it a less evil that some criminals should escape than that the government should play an ignoble part"- Oliver Wendell Holmes, Jr.
|6.||base - illegitimate|
illegitimate - of marriages and offspring; not recognized as lawful
|7.||base - debased; not genuine; "an attempt to eliminate the base coinage"|
bottom top, crown, summit, peak, crest, apex, vertex
dishonourable good, just, rare, moral, pure, valuable, noble, upright, admirable, honourable, honest, righteous, virtuous
to get to or reach first base (esp US) (Baseball) → llegar a la primera base (fig) → alcanzar la primera meta
to touch base with sb (esp US) → ponerse en contacto con algn
to touch or cover all (the) bases (esp US) → abarcarlo todo
to be off base (US) he's way off base → está totalmente equivocado
we were based on Malta → nos estacionaron en Malta
the job is based in London → el trabajo tiene su base en Londres
where are you based now? → ¿dónde estás ahora?
base coat N [of paint] → primera capa f
base form N (Ling) → base f derivativa
base jumping N salto en paracaídas realizado ilegalmente desde rascacielos, puentes, etc.
base lending rate N → tipo m de interés base
base period N → período m base
base rate N → tipo m de interés base
base2 [beɪs] (baser (compar) (basest (superl))) ADJ
Her base was her home in Scotland → Elle se servait de sa maison en Écosse comme base.
Monaco is my base
BUT Je suis basé à Monaco.
to touch base with sb (= get in touch) → reprendre contact avec qn
I'm based in London → Je suis basé à Londres.
They're based in France → Ils sont basés en France.
I'm based in London → sono di base or ho base a Londra
the job is based in London → la sede di lavoro è a Londra
a Paris-based firm → una ditta con sede centrale a Parigi
coffee-based → a base di caffè