molecule

[ mol-uh-kyool ]
/ ˈmɒl əˌkyul /

noun

Chemistry, Physics. the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound.
Chemistry. a quantity of a substance, the weight of which, measured in any chosen unit, is numerically equal to the molecular weight; gram molecule.
any very small particle.

Origin of molecule

1785–95; earlier molecula < New Latin, equivalent to Latin mōlē(s) mass + -cula -cule1
Related formssub·mol·e·cule, nounsu·per·mol·e·cule, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for molecule

molecule

/ (ˈmɒlɪˌkjuːl) /

noun

the simplest unit of a chemical compound that can exist, consisting of two or more atoms held together by chemical bonds
a very small particle

Word Origin for molecule

C18: via French from New Latin mōlēcula, diminutive of Latin mōlēs mass, mole 4
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

Medicine definitions for molecule

molecule

[ mŏlĭ-kyōōl′ ]

n.

The smallest particle into which an element or a compound can be divided without changing its chemical and physical properties; a group of atoms that is held together chemically.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for molecule

molecule

[ mŏlĭ-kyōōl′ ]

A group of two or more atoms linked together by sharing electrons in a chemical bond. Molecules are the fundamental components of chemical compounds and are the smallest part of a compound that can participate in a chemical reaction.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Culture definitions for molecule

molecule

[ (mol-uh-kyoohl) ]

A combination of two or more atoms held together by a force between them. (See covalent bond and ionic bond.)


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.