molecule

noun
mol·​e·​cule | \ ˈmä-li-ˌkyül How to pronounce molecule (audio) \

Definition of molecule

1 : the smallest particle of a substance that retains all the properties (see property sense 1a) of the substance and is composed of one or more atoms (see atom sense 1a) a molecule of water a molecule of oxygen
2 : a tiny bit : particle a molecule of political honestyTime

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Examples of molecule in a Sentence

There is not a molecule of evidence to support these charges. not a molecule of sense in that girl

Recent Examples on the Web

But critics say that these synthetic molecules may build up on strands, leading to breakage and preventing moisture from absorbing. Deanna Pai, Bon Appétit, "Why a Good, Clean Haircare Brand Is Hard to Find," 11 June 2019 These compositions help determine how these different molecules taste in our mouths and work in our bodies. Carolyn L. Todd, SELF, "Here's What Carbs Actually Do in Your Body," 23 May 2019 These molecules were transcribed from genes involved in synaptic formation that are under-edited in autistic brains and further showed that FMRP1 is required to edit those sites. Diana Gitig, Ars Technica, "Autism involves a large-scale reduction in RNA editing," 21 Dec. 2018 Decades of research have shown these molecules and several of their cousins to be legitimately weird and wonderful enzymes. Robbie Gonzalez, WIRED, "DNA-Repairing Sunscreen: Legit or Not?," 2 July 2018 For plants and fungi to make these very complicated molecules that happen to be the key that unlocks receptors in the animal brain. Recode Staff, Recode, "Full transcript: Author Michael Pollan on Recode Decode," 22 May 2018 Eggs are large cells, with room to accommodate these extra molecules. The Economist, "The generation gameThe ramifications of a new type of gene," 22 Feb. 2018 Upon entering our airspace, cosmic rays first obliterate some hapless molecule in Earth’s atmosphere. Adam Hadhazy, Discover Magazine, "Scientists Hunt for A Seeming Paradox: A Magnet With Only One Pole," 13 Nov. 2018 The crucial factor here is the size of the fatty acid molecules that make up the oil. Jenn Sinrich, SELF, "What You Should Know Before Using a Trendy New Face Oil," 13 Mar. 2019

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.

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First Known Use of molecule

1701, in the meaning defined at sense 1

History and Etymology for molecule

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

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Statistics for molecule

Last Updated

14 Jun 2019

Look-up Popularity

Time Traveler for molecule

The first known use of molecule was in 1701

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More Definitions for molecule

molecule

noun

English Language Learners Definition of molecule

: the smallest possible amount of a particular substance that has all the characteristics of that substance
: a very small amount of something

molecule

noun
mol·​e·​cule | \ ˈmä-li-ˌkyül How to pronounce molecule (audio) \

Kids Definition of molecule

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

molecule

noun
mol·​e·​cule | \ ˈmäl-i-ˌkyü(ə)l How to pronounce molecule (audio) \

Medical Definition of molecule

: 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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