alpha

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al·pha

 (ăl′fə)
n.
1. The first letter of the Greek alphabet. See Table at alphabet.
2. The first of a series; the beginning.
3. Astronomy The brightest star in a constellation.
4.
a. The mathematical estimate of the return on a security when the return on the market as a whole is zero. Alpha is derived from a in the formula Ri = a + bRm, which measures the return on a security (Ri) for a given return on the market (Rm) where b is beta.
b. The return on an investment portfolio that can be attributed to the skill of the portfolio's manager rather than the performance of the market.
adj.
1. Being the highest ranked or most dominant individual of one's sex. Used of social animals: the alpha female of the wolf pack.
2. Chemistry
a. Being in the first position relative to a designated carbon atom in an organic molecule at which an atom or a group may be substituted.
b. Referring to the first of a group of isomers, or molecules of similar origin or properties, determined arbitrarily by those who discover or classify them. Used in combination: alpha-tocopherol.
3. Alphabetical.

[Greek, of Phoenician origin; see ʔlp in Semitic roots.]

alpha

(ˈælfə)
n
1. (Letters of the Alphabet (Foreign)) the first letter in the Greek alphabet (Α, α), a vowel transliterated as a
2. (Education) Brit the highest grade or mark, as in an examination
3. (General Physics) (modifier)
a. involving or relating to helium-4 nuclei: an alpha particle.
b. relating to one of two or more allotropes or crystal structures of a solid: alpha iron.
c. relating to one of two or more isomeric forms of a chemical compound, esp one in which a group is attached to the carbon atom to which the principal group is attached
4. (modifier) denoting the dominant person or animal in a group: the alpha male.
[via Latin from Greek, of Phoenician origin; related to Hebrew āleph, literally: ox]

Alpha

(ˈælfə)
n
1. (Astronomy) (foll by the genitive case of a specified constellation) usually the brightest star in a constellation: Alpha Centauri.
2. (Communications & Information) communications a code word for the letter a

al•pha

(ˈæl fə)

n., pl. -phas,
adj. n.
1. the first letter of the Greek alphabet (Α, α).
2. the first; beginning.
3. (cap.) the brightest star in a constellation: Alpha Centauri.
4. the first or foremost in a series of related items.
adj.
5.
a. (esp. of animals) having the highest rank of its sex in a dominance hierarchy: the alpha female.
b. being the most prominent, talented, or aggressive person in a group: the alpha male of investment bankers.
6. pertaining or linked to the carbon atom closest to a particular group in an organic molecule.
[< Latin < Greek álpha < Semitic; compare aleph]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.alpha - the 1st letter of the Greek alphabetalpha - the 1st letter of the Greek alphabet
Greek alphabet - the alphabet used by ancient Greeks
alphabetic character, letter of the alphabet, letter - the conventional characters of the alphabet used to represent speech; "his grandmother taught him his letters"
2.alpha - the beginning of a series or sequencealpha - the beginning of a series or sequence; "the Alpha and Omega, the first and the last, the beginning and the end"--Revelations
start - the beginning of anything; "it was off to a good start"
Adj.1.alpha - first in order of importancealpha - first in order of importance; "the alpha male in the group of chimpanzees"; "the alpha star in a constellation is the brightest or main star"
important, of import - of great significance or value; "important people"; "the important questions of the day"
2.alpha - early testing stage of a software or hardware productalpha - early testing stage of a software or hardware product; "alpha version"
explorative, exploratory - serving in or intended for exploration or discovery; "an exploratory operation"; "exploratory reconnaissance"; "digging an exploratory well in the Gulf of Mexico"; "exploratory talks between diplomats"

alpha

noun
the alpha and omega first and last, be-all and end-all He was the alpha and omega of the comedy series.
Translations
alfa
alfa
alfa
alfa
알파
alpha
alfa
alfa

alpha

[ˈælfə]
A. N (= letter) → alfa f (Brit) (Scol, Univ) → sobresaliente m
B. CPD alpha particle N (Phys) → partícula f alfa
alpha rhythm, alpha wave N (Physiol) → ritmo m alfa

alpha

n
(= letter)Alpha nt
(Brit Sch, Univ) → Eins f; alpha plusEins (→ plus (hum)); (Sch also) → Eins (→ mit Stern (hum))

alpha

:
alpha particle
nAlphateilchen nt
alpha ray
nAlphastrahl m
alpha rhythm, alpha wave
n (Physiol) → Alpharhythmus m

alpha

[ˈælfə]
1. nalfa m or f inv
2. adj (Phys) alpha particleparticella f alfa inv

alpha

n alfa; — fetoprotein alfa fetoproteína; — galactosidase alfa galactosidasa; — hydroxy acids ácidos alfa hidróxidos; — methyldopa alfa metildopa
References in periodicals archive ?
Age, hepatitis B surface antigen, hepatitis B e antigen, partial thromboplastin time, total bilirubin, alkaline phosphatase, a-glutamyltransferase, a-fetoprotein, tumor size, cirrhosis, vascular invasion, differentiation, encapsulation, and tumor number were finally retained by a backward step-down selection process with the Akaike information criterion.
A major change in approach to prenatal diagnosis occurred in 1973 when a-fetoprotein was discovered in maternal blood and elevation of the protein had a strong association with fetal neural tube defects (anaencephaly and severe spina bifida) in early pregnancy (13).
Comparative study of three amniotic fluid markers in premature rupture of membranes: prolactin, b subunit of human chorionic gonadotropin, and a-fetoprotein.
While there was no abnormal finding of the testes, marked elevation of serum testicular tumour markers was noted with human chorionic gonadotropin (hCG) 150670 mIU/mL, [beta]-hCG 9772 ng/mL, a-fetoprotein (AFP) 2232 ng/dL, and lactate dehydrase (LDH) 1682 IU/L.
Biopsy is, however, not routine in the work up of HB and HCC, although it is used where there is diagnostic doubt since HB may present similarly to UESL and have low a-fetoprotein levels.
Screening programs for open neural tube defects began in the late 1970s, following documentation that elevated levels of maternal serum a-fetoprotein (AFP) in the second trimester were associated with open spina bifida and anencephaly.
The diagnosis can also be suspected in antenatal period if ultrasonography is normal in presence of the raised a-fetoprotein level in amniotic fluid and maternal blood or a positive acetyl - cholinesterase test.