Definition of ATOM

atom

Meanings

Plural: atoms

Noun

  • (physics and chemistry) the smallest component of an element having the chemical properties of the element
  • (nontechnical usage) a tiny piece of anything
  • The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
  • A hypothetical particle posited by Greek philosophers as an ultimate and indivisible component of matter.
  • The smallest, indivisible constituent part or unit of something.
  • In logical atomism, a fundamental fact that cannot be further broken down.
  • The smallest medieval unit of time, equal to fifteen ninety-fourths of a second.
  • A mote of dust in a sunbeam.
  • A very small amount; a whit.
  • An individual number or symbol, as opposed to a list; a scalar value.
  • An integer representing a particular string.
  • A non-zero member of a partially ordered set that has only zero below it (assuming that the poset has a least element, its "zero").
  • An element of a set that is not itself a set; an urelement.
  • An age group division in hockey for nine- to eleven-year-olds.

Origin / Etymology

From Middle English attome, from Middle French athome, from Latin atomus (“smallest particle”), from Ancient Greek ἄτομος (átomos, “indivisible”), from ἀ- (a-, “not”) + τέμνω (témnō, “I cut”). Atoms are so named because historically the notion was that they were indivisible, given that chemically they are indeed so; the splitting of atoms awaited a later era of science and technology, and nonchemical means. Doublet of atomus.

Antonyms

coatom

Scrabble Score: 6

atom is a valid Scrabble (US) TWL word
atom is a valid Scrabble Word in Merriam-Webster MW Dictionary
atom is a valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 7

atom is a valid Words With Friends word