atom — late 15c., as a hypothetical indivisible body, the building block of the universe, from L. atomus (especially in Lucretius) indivisible particle, from Gk. atomos uncut, unhewn; indivisible, from a not + tomos a cutting, from temnein to cut (see… … Etymology dictionary
atom — /at euhm/, n. 1. Physics. a. the smallest component of an element having the chemical properties of the element, consisting of a nucleus containing combinations of neutrons and protons and one or more electrons bound to the nucleus by electrical… … Universalium
Atom — The atom is the smallest unit of an element that retains the chemical properties of that element. An atom has an electron cloud consisting of negatively charged electrons surrounding a dense nucleus. The nucleus contains positively charged… … Wikipedia
atom — Synonyms and related words: Bohr atom, Dirac atom, I, Lewis Langmuir atom, Thomson atom, ace, acid, acidity, agent, air, alkali, alkalinity, alloisomer, anion, antacid, atomic model, atomic particles, atoms, base, biochemical, bit, brute matter,… … Moby Thesaurus
Unit fraction — A unit fraction is a rational number written as a fraction where the numerator is one and the denominator is a positive integer. A unit fraction is therefore the reciprocal of a positive integer, 1/ n . Examples are 1/1, 1/2, 1/3, 1/42 etc.… … Wikipedia
Atom (disambiguation) — An atom is the smallest particle of a chemical element that retains its chemical properties.Atom may also refer to: * Atom (measure theory), a minimal measurable set * Atom (order theory) * Atomic formula, a single predicate in first order logic… … Wikipedia
Atom.com — Infobox Company type = Humor website company name = Atom.com parent = MTV Networks (Viacom) foundation = 1998 location = San Francisco, CA industry = Online video entertainment homepage = http://www.atom.com/Atom.com (formerly AtomFilms) is an… … Wikipedia
unit — 01. We will begin [unit] four in the grammar text on Monday. 02. The patient received four [units] of blood during the operation. 03. She has been working in the marketing [unit] for over a year now. 04. He always gets confused when trying to… … Grammatical examples in English
atom */*/ — UK [ˈætəm] / US noun [countable] Word forms atom : singular atom plural atoms 1) science the smallest unit of any substance. It consists of a nucleus made of protons and neutrons with electrons travelling around it hydrogen/carbon/oxygen atoms 2) … English dictionary
unit — 1. One; a single person or thing. 2. A standard of measure, weight, or any other quality, by multiplications or fractions of which a scale or system is formed. 3. A group of persons or things considered as a whole because of mutual activities or… … Medical dictionary
