atom

[ at-uhm ]

/ ˈæt əm /

SEE SYNONYMS FOR atom ON THESAURUS.COM

noun

Physics.

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 attraction; the number of protons determines the identity of the element.
an atom with one of the electrons replaced by some other particle: muonic atom; kaonic atom.

Energy. this component as the source of nuclear energy.

a hypothetical particle of matter so minute as to admit of no division.

anything extremely small; a minute quantity.

Origin of atom

1350–1400; Middle English attomos, athomus<Latin atomus<Greek átomos, noun use of átomos undivided, equivalent to a-a-⁶ + tomós divided, verbid of témnein to cut

SYNONYMS FOR atom

4 shred, speck, scintilla, iota, jot, whit.

SEE SYNONYMS FOR atom ON THESAURUS.COM

Words nearby atom

at. no., ATO, at odds, A to J, atoll, atom, atom-bomb, atomic, atomic age, atomic bomb, atomic clock

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for atom

The atoms vibrate less, and because such vibrations are simply heat, the alloy’s temperature drops.
The Shape-Shifting Squeeze Coolers|Marcus Woo|August 24, 2020|Quanta Magazine
Einstein used Brownian motion to deduce the existence of atoms, which bombard the microscopic particles.
How the Bits of Quantum Gravity Can Buzz|Thomas Lewton|July 23, 2020|Quanta Magazine
It is really fascinating that atoms and quarks, following very different rules, can both form very similar complex objects.
CERN: Physicists Report the Discovery of Unique New Particle|Harry Cliff|July 15, 2020|Singularity Hub
Lenz noted that if most atoms pointed together, their tiny magnetic fields would fuse, and the material would act like a magnet overall.
The Cartoon Picture of Magnets That Has Transformed Science|Charlie Wood|June 24, 2020|Quanta Magazine

A negatively charged oxygen atom sits at the bottom of that “V,” explains Xia.
Here’s one way to harvest water right out of the air|Sid Perkins|April 24, 2020|Science News For Students
Check: “This atom smashing business is going to herald the final victory of the machine.”
Mailer’s Letters Pack a Punch and a Surprising Degree of Sweetness|Ronald K. Fried|December 14, 2014|DAILY BEAST
Releasing a new issue was like dropping an atom bomb on the industry.
It Was All a Dream: Drama, Bullshit, and the Rebirth of The Source Magazine|Alex Suskind|October 14, 2014|DAILY BEAST
You have the atom, which has the neutron, the electron, the proton.
‘Crazy’ Harlem Pastor Hates on Obama and Gays|Olivia Nuzzi|September 28, 2014|DAILY BEAST
A face in a sea of faces, how could you know he hid among them like Oppenheimer, building a lab to split the atom.
The Stacks: How Leonard Chess Helped Make Muddy Waters|Alex Belth|August 2, 2014|DAILY BEAST
Each type of atom and molecule has its own unique spectrum, according to the rules of quantum mechanics.
SAMI Is Like Google Earth for the Universe|Matthew R. Francis|July 27, 2014|DAILY BEAST
"I don't believe there's an atom of meaning in it," ventured Alice.
Alice in Wonderland|Lewis Carroll
She regarded that swinging window of heavy plate glass with an anxiety of desire that thrilled through every atom of her blood.
When the Cock Crows|Waldron Baily
Will you tell our readers what you think of using the atom bomb against the grass?
Greener Than You Think|Ward Moore
The mass of each particle is, according to the latest and finest measurements 1/1845 of that of an atom of hydrogen.
The Outline of Science, Vol. 1 (of 4)|J. Arthur Thomson
The señora looked again at the atom; she held out a timorous finger to him.
Leerie|Ruth Sawyer

British Dictionary definitions for atom

atom

/ (ˈætəm) /

noun

the smallest quantity of an element that can take part in a chemical reaction
this entity as a source of nuclear energythe power of the atom See also atomic structure

any entity regarded as the indivisible building block of a theory

the hypothetical indivisible particle of matter postulated by certain ancient philosophers as the fundamental constituent of matterSee also atomism

a very small amount or quantity; minute fragmentto smash something to atoms; there is not an atom of truth in his allegations

Word Origin for atom

C16: via Old French and Latin, from Greek atomos (n), from atomos (adj) that cannot be divided, from a- 1 + temnein to cut

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Cultural definitions for atom

atom

A unit of matter; the smallest unit of a chemical element. Each atom consists of a nucleus, which has a positive charge, and a set of electrons that move around the nucleus. (See Bohr atom.)

notes for atom

Atoms link together to form molecules.

Medical definitions for atom

atom

[ ăt′əm ]

n.

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.

This unit regarded as a source of nuclear energy.

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

The irreducible, indestructible material unit postulated by ancient atomism.

An extremely small part, quantity, or amount.

Other words from atom

a•tom′ic (ə-tŏm′ĭk) adj.

Scientific definitions for atom

atom

[ ăt′əm ]

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 ion isotope orbital.

单词	atom
释义	atom [ at-uhm ] / ˈæt əm / SEE SYNONYMS FOR atom ON THESAURUS.COM noun Physics. 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 attraction; the number of protons determines the identity of the element. an atom with one of the electrons replaced by some other particle: muonic atom; kaonic atom. Energy. this component as the source of nuclear energy. a hypothetical particle of matter so minute as to admit of no division. anything extremely small; a minute quantity. Origin of atom 1350–1400; Middle English attomos, athomus<Latin atomus<Greek átomos, noun use of átomos undivided, equivalent to a-a-⁶ + tomós divided, verbid of témnein to cut SYNONYMS FOR atom 4 shred, speck, scintilla, iota, jot, whit. SEE SYNONYMS FOR atom ON THESAURUS.COM Words nearby atom at. no., ATO, at odds, A to J, atoll, atom, atom-bomb, atomic, atomic age, atomic bomb, atomic clock Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for atom The atoms vibrate less, and because such vibrations are simply heat, the alloy’s temperature drops. The Shape-Shifting Squeeze Coolers\|Marcus Woo\|August 24, 2020\|Quanta Magazine Einstein used Brownian motion to deduce the existence of atoms, which bombard the microscopic particles. How the Bits of Quantum Gravity Can Buzz\|Thomas Lewton\|July 23, 2020\|Quanta Magazine It is really fascinating that atoms and quarks, following very different rules, can both form very similar complex objects. CERN: Physicists Report the Discovery of Unique New Particle\|Harry Cliff\|July 15, 2020\|Singularity Hub Lenz noted that if most atoms pointed together, their tiny magnetic fields would fuse, and the material would act like a magnet overall. The Cartoon Picture of Magnets That Has Transformed Science\|Charlie Wood\|June 24, 2020\|Quanta Magazine A negatively charged oxygen atom sits at the bottom of that “V,” explains Xia. Here’s one way to harvest water right out of the air\|Sid Perkins\|April 24, 2020\|Science News For Students Check: “This atom smashing business is going to herald the final victory of the machine.” Mailer’s Letters Pack a Punch and a Surprising Degree of Sweetness\|Ronald K. Fried\|December 14, 2014\|DAILY BEAST Releasing a new issue was like dropping an atom bomb on the industry. It Was All a Dream: Drama, Bullshit, and the Rebirth of The Source Magazine\|Alex Suskind\|October 14, 2014\|DAILY BEAST You have the atom, which has the neutron, the electron, the proton. ‘Crazy’ Harlem Pastor Hates on Obama and Gays\|Olivia Nuzzi\|September 28, 2014\|DAILY BEAST A face in a sea of faces, how could you know he hid among them like Oppenheimer, building a lab to split the atom. The Stacks: How Leonard Chess Helped Make Muddy Waters\|Alex Belth\|August 2, 2014\|DAILY BEAST Each type of atom and molecule has its own unique spectrum, according to the rules of quantum mechanics. SAMI Is Like Google Earth for the Universe\|Matthew R. Francis\|July 27, 2014\|DAILY BEAST "I don't believe there's an atom of meaning in it," ventured Alice. Alice in Wonderland\|Lewis Carroll She regarded that swinging window of heavy plate glass with an anxiety of desire that thrilled through every atom of her blood. When the Cock Crows\|Waldron Baily Will you tell our readers what you think of using the atom bomb against the grass? Greener Than You Think\|Ward Moore The mass of each particle is, according to the latest and finest measurements 1/1845 of that of an atom of hydrogen. The Outline of Science, Vol. 1 (of 4)\|J. Arthur Thomson The señora looked again at the atom; she held out a timorous finger to him. Leerie\|Ruth Sawyer British Dictionary definitions for atom atom / (ˈætəm) / noun the smallest quantity of an element that can take part in a chemical reaction this entity as a source of nuclear energythe power of the atom See also atomic structure any entity regarded as the indivisible building block of a theory the hypothetical indivisible particle of matter postulated by certain ancient philosophers as the fundamental constituent of matterSee also atomism a very small amount or quantity; minute fragmentto smash something to atoms; there is not an atom of truth in his allegations Word Origin for atom C16: via Old French and Latin, from Greek atomos (n), from atomos (adj) that cannot be divided, from a- 1 + temnein to cut Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Words related to atom speck, morsel, minimum, whit, mote, scrap, modicum, shred, tittle, iota, jot, trace, fragment, spot, scintilla, molecule, bit, mite, smidgen, crumb Cultural definitions for atom atom A unit of matter; the smallest unit of a chemical element. Each atom consists of a nucleus, which has a positive charge, and a set of electrons that move around the nucleus. (See Bohr atom.) notes for atom Atoms link together to form molecules. The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Medical definitions for atom atom [ ăt′əm ] n. 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. This unit regarded as a source of nuclear energy. A part or particle considered to be an irreducible constituent of a specified system. The irreducible, indestructible material unit postulated by ancient atomism. An extremely small part, quantity, or amount. Other words from atom a•tom′ic (ə-tŏm′ĭk) adj. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for atom atom [ ăt′əm ] 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 ion isotope orbital. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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atom

noun

Origin of atom

SYNONYMS FOR atom

Words nearby atom

Example sentences from the Web for atom

British Dictionary definitions for atom

noun

Word Origin for atom

Words related to atom

Cultural definitions for atom

notes for atom

Medical definitions for atom

n.

Other words from atom

Scientific definitions for atom