Atom

Word ATOM
Character 4
Hyphenation at om
Pronunciations /ˈatəm/

Definitions and meanings of "Atom"

What do we mean by atom?

A part or particle considered to be an irreducible constituent of a specified system. noun

The irreducible, indestructible material unit postulated by ancient atomism. noun

An extremely small part, quantity, or amount. noun

The smallest unit of an element, having all the characteristics of that element and consisting of a very small and dense central nucleus containing protons and neutrons, surrounded by one or more shells of orbiting electrons. Atoms remain undivided in chemical reactions except for the donation, acceptance, or exchange of valence electrons. noun

This unit regarded as a source of nuclear energy. noun

To reduce to atoms; atomize.

An extremely minute particle of matter: a term used generally with certain philosophic or scientific limitations. noun

A particle of matter assumed not to be divided under the circumstances considered; a molecule. noun

In chem. and physics, the unit of matter; the smallest mass of an element that exists in any molecule. The number of kinds of atoms is the same as the number of the elements. All atoms of the same element have the same constant weight. They are for the most part combined with other atoms, either of the same or of a different kind, forming molecules, and are indivisible by chemical force. The atom is sometimes called the chemical unit, in distinction from the molecule or physical unit, the latter being the smallest particle of any kind of matter which can exhibit all the properties of that matter; but atom is also sometimes used as synonymous with molecule in this sense. noun

Hence Anything extremely small; a minute quantity: as, he has not an atom of sense. noun

The smallest division of time, equal to about ⅙ of a second. noun

Anything indivisible; an individual. noun

An ultimate indivisible particle of matter. noun

An ultimate particle of matter not necessarily indivisible; a molecule. noun

A constituent particle of matter, or a molecule supposed to be made up of subordinate particles. noun

The smallest particle of matter that can enter into combination; one of the elementary constituents of a molecule. noun

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.

(history of science) 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.

(Lisp) An individual number or symbol, as opposed to a list; a scalar value.

A non-zero member of a Boolean algebra that is not a union of any other elements. Or, a non-zero member of a Boolean lattice that has only zero below it.

An element of a set that is not itself a set; an urelement.

(usually capitalised as "Atom") A member of an age group division in hockey for ten- to 11-year-olds.

Synonyms and Antonyms for Atom

  • Antonyms for atom
  • Atom antonyms not found!

The word "atom" in example sentences

We now suppose that it is _a rapid movement of electrons from atom to atom_ in the wire or wherever the current is. ❋ J. Arthur Thomson (1897)

Coined in ancient Greece, the term atom means “indivisible unit,” and through the nineteenth century, scientists believed that our entire physical universe was composed of these elementary particles. ❋ John Assaraf (2008)

While the term atom, therefore, is applicable only to elements, the term molecule is applicable both to elements and compounds. ❋ William McPherson (N/A)

Thus the term atom indicates not only the constituents of molecules but has a quantitative meaning, the proportional part of the element which enters into compounds. ❋ 1840-1916 (1913)

I do think that harnessing the power of the atom is the way to go. ❋ Unknown (2007)

The energy produced by the breaking down of the atom is a very poor kind of thing. ❋ Unknown (2007)

It was the ancient Greeks who gave us the idea of atoms, fundamental and invisibly small particles of matter, and also the word atom, which means “uncuttable,” “indivisible.” ❋ Harold McGee (2004)

(For convenience, "atom" is included as a special case of molecule). ❋ Unknown (2009)

The atom is now said to be in an excited state, but it only lasts for a tiny fraction of a second. ❋ Ewillett (2010)

The use of BECs in atom interferometers should allow for more sophisticated tests of general relativity. ❋ Unknown (2010)

The size of the nucleus in the carbon atom is off by a factor of about 10,000. ❋ Unknown (2009)

The thin flake of carbon, the duo created in 2004, just as thick as an atom is exceptionally strong and it conducts electricity like copper. ❋ PhD Santhosh Mathew (2010)

When the nucleus of an atom is split apart, a tremendous amount of energy is released. ❋ Unknown (2009)

A uranium atom is a very complicated mechanism, but does tend to break down on occasion* — but it's still a lot more reliable than any human device. ❋ Unknown (2009)

In each of the 19 pathways for the generation of chiral amino acids, the stereochemistry at the α-carbon atom is established by a transamination reaction that involves pyridoxal phosphate. ❋ Unknown (2010)

Cross Reference for Atom

What does atom mean?

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