at·om ( t  m)n. 1. a. A part or particle considered to be an irreducible constituent of a specified system. b. The irreducible, indestructible material unit postulated by ancient atomism. 2. An extremely small part, quantity, or amount. 3. Physics & Chemistry a. A unit of matter, the smallest unit of an element, having all the characteristics of that element and consisting of a dense, central, positively charged nucleus surrounded by a system of electrons. The entire structure has an approximate diameter of 10-8 centimeter and characteristically remains undivided in chemical reactions except for limited removal, transfer, or exchange of certain electrons. b. This unit regarded as a source of nuclear energy. See Table at subatomic particle. [Middle English attome, from Latin atomus, from Greek atomos, indivisible, atom : a-, not; see a-1 + tomos, cutting (from temnein, to cut; see tem- in Indo-European roots).] |   carbon atom |
atom [ˈætəm]
n
1. (Physics / Atomic Physics)
a. the smallest quantity of an element that can take part in a chemical reaction
b. this entity as a source of nuclear energy the power of the atom See also atomic structure
2. any entity regarded as the indivisible building block of a theory
3. (Philosophy) the hypothetical indivisible particle of matter postulated by certain ancient philosophers as the fundamental constituent of matter See also atomism
4. a very small amount or quantity; minute fragment to smash something to atoms there is not an atom of truth in his allegations
[via Old French and Latin, from Greek atomos (n), from atomos (adj) that cannot be divided, from a-1 + temnein to cut]
| atom (tm) The smallest unit of an element, consisting of at least one proton and (for all elements except hydrogen) one or more neutrons in a dense central nucleus, surrounded by one or more shells of electrons. In electrically neutral atoms, the number of protons equals the number of electrons. Atoms remain intact in chemical reactions except for the removal, transfer, or exchange of certain electrons. Compare compound. See also ionisotopeorbital |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  atom - (physics and chemistry) the smallest component of an element having the chemical properties of the elementsubstance - the real physical matter of which a person or thing consists; "DNA is the substance of our genes" chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics" elementary particle, fundamental particle - (physics) a particle that is less complex than an atom; regarded as constituents of all matter nucleus - the positively charged dense center of an atom isotope - one of two or more atoms with the same atomic number but with different numbers of neutrons monad - (chemistry) an atom having a valence of one chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter carbon atom - an atom of carbon hydrogen atom - an atom of hydrogen molecule - (physics and chemistry) the simplest structural unit of an element or compound free radical, radical - an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule; "in the body free radicals are high-energy particles that ricochet wildly and damage cells" |
| 2. |  atom - (nontechnical usage) a tiny piece of anythinggrain - a relatively small granular particle of a substance; "a grain of sand"; "a grain of sugar" grinding - material resulting from the process of grinding; "vegetable grindings clogged the drain" material, stuff - the tangible substance that goes into the makeup of a physical object; "coal is a hard black material"; "wheat is the stuff they use to make bread" chylomicron - a microscopic particle of triglycerides produced in the intestines during digestion; in the bloodstream they release their fatty acids into the blood flyspeck - a tiny dark speck made by the excrement of a fly identification particle - a tiny particle of material that can be added to a product to indicate the source of manufacture |
atom
Translations
atom [ˈætəm]
A. N
1. (Phys) → átomo m
B. CPD atom bomb N → bomba f atómica
atom smasher N → acelerador m de partículas atómicas, rompeátomos m inv
atom smasher N → acelerador m de partículas atómicas, rompeátomos m inv
atom
atom [ˈætəm] n → atomo (fig) not an atom of truth → nemmeno un pizzico di verità
atom [ˈætəm] n → atomo (fig) not an atom of truth → nemmeno un pizzico di verità
atom [ˈætəm] n → atomo (fig) not an atom of truth → nemmeno un pizzico di verità
n atom [ˈӕtəm]
1 the smallest part of an element. atoom ذَرَّه атом atom atom das Atom άτομο átomo aatom اتم atomi atome אָטוֹם परमाणु atom atom atom atóm, frumeind atomo 原子 원자 atomas atoms atom atoom atom atom átomo atom атом atóm atom atom atom อะตอม atom 原子 атом کسی عنصر کا سب سے چھوٹا ذرہ nguyên tử 原子
2 anything very small There's not an atom of truth in what she says. greintjie مِقْدار ضَئيل جِداً частица zrnko gran das Körnchen ίχνος, ψήγμα ápice, pizca, gota kübe ذره؛ خرده hitunen parcelle גַרעִין रत्ती भर trunka parányi sedikit snefill briciola 微量 극히 작은 것 dalelė druska sedikit pun greintje fnugg, prikk odrobina átomo pic, strop капля zrnko, kúsok kanček zrnce smula, dugg, uns ปริมาณที่น้อยมาก zerre 絲毫 краплина انتہائی چھوٹا vật nhỏ 微粒
adj aˈtomic [-ˈto-]
atomies ذَرّي атомен atomový atom- Atom-... ατομικός atómico aatom(i)- اتمی atomi- atomique אָטוֹמִי, גַרעִינִי परमाण्विक atomski atom- dari atom atóm-, kjarnorku-; örsmár atomico 原子の 원자의 atominis atoma- atom atoom- atom- atomowy atómico atomic атомный atómový atomski atomski atomisk เกี่ยวกับปรมาณู atomla ilgili 原子的 атомний ایٹمی thuộc nguyên tử 原子的
atom(ic) bomb
a bomb using atomic energy. atoombom قُنْبُلَه ذَرِّيه атомна бомба atomová bomba atombombe die Atombombe ατομική βόμβα bomba atómica aatomipomm بمب اتمی atomipommi bombe atomique פְּצָצָה אָטוֹמִית परमाणु बम atomski atombomba bom atom kjarnorkusprengja bomba atomica 原子爆弾 원자 폭탄 atominė bomba atombumba bom atom atoombom atombombe bomba atomowa bomba atómica bombă atomică атомная бомба atómová bomba atomska bomba atomska bomba atombomb ระเบิดปรมาณู atom bombası 原子彈 атомна бомба ایٹمی بم bom nguyên tử 原子弹
atomic energy
very great energy obtained by breaking up the atoms of some substances. atoomenergie طاقَة ذَرِّيه атомна енергия atomová energie atomenergi die Atomenergie ατομική ενέργεια energía atómica/nuclear aatomienergia انرژی اتمی atomienergia énergie atomique אֶנֶרגיָה גַרעִינִית परमाणु ऊर्जा atomska energija atomenergia tenaga atom kjarnorka energia atomica 原子力 원자 에너지 atominė energija atomenerģija tenaga nuklear atoomenergie atomenergi energia atomowa energia atómica energie atomică атомная энергия atómová energia atomska energija atomska energija atomenergi พลังงานอะตอม atom enerjisi 原子能 атомна енергія ایٹمی توانائی năng lượng nguyên tử 原子能
atomic power
power (for making electricity etc) obtained from atomic energy. atoomkrag قُوَّه ذَرِّيه атомна енергия atomová energie kernekraft; atomkraft die Atomkraft ατομική ενέργεια energía nuclear aatomienergia اانرژی حاصل از فرآیند اتمی atomivoima énergie nucléaire כּוֹח גַרעִינִי परमाणु ऊर्जा atomska snaga atomenergia tenaga nuklir kjarnorka energia nucleare 原子力 (発電) 원자력 atominė energija atomenerģija kuasa nuklear atoomkracht kjernekraft, atomkraft energia atomowa poder atómico energie atomică/nucleară атомная энергия atómová energia nuklearna energija atomska snaga atomkraft พลังงานปรมาณู atom gücü 原子力 атомна електростанція; атомна енергетика ایٹمی قوت năng lượng nguyên tử 原子动力
atom → ذَرَّة atom atom Atom άτομο átomo atomi atome atom atomo 原子 원자 atoom atom atom átomo атом atom อะตอม atom nguyên tử 原子
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