molecule

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noun mol·e·cule \ˈmä-li-ˌkyül\

Definition of molecule

  1. 1 :  the smallest particle of a substance that retains all the properties (see property 1a) of the substance and is composed of one or more atoms (see atom 1a) a molecule of water a molecule of oxygen

  2. 2 :  a tiny bit :  particle a molecule of political honesty — Time

Examples of molecule in a Sentence

  1. There is not a molecule of evidence to support these charges.

  2. not a molecule of sense in that girl

Recent Examples of molecule from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'molecule'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of molecule

French molécule, from New Latin molecula, diminutive of Latin moles mass

Other Chemical Engineering Terms


MOLECULE Defined for English Language Learners

molecule

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noun

Definition of molecule for English Language Learners

  • : the smallest possible amount of a particular substance that has all the characteristics of that substance

  • : a very small amount of something


MOLECULE Defined for Kids

molecule

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noun mol·e·cule \ˈmä-li-ˌkyül\

Definition of molecule for Students

  1. :  the smallest portion of a substance having the properties of the substance a molecule of water


Medical Dictionary

molecule

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noun mol·e·cule \ˈmäl-i-ˌkyü(ə)l\

Medical Definition of molecule

  1. :  the smallest particle of a substance that retains all the properties of the substance and is composed of one or more atoms



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