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

Nearly 200 molecules give vanilla its subtle flavour. The Economist, "The murky world of Madagascar’s roaring vanilla trade," 5 July 2019 The science exhibits included how to make bottled rockets, make molecules out of marshmallows, DUI slime, elephant toothpaste and a demonstration of liquid nitrogen’s effect on flower petals. Brooke Lamantia And Austin Taylor, ExpressNews.com, "It’s a red, white and blue celebration at local Fourth of July parade," 4 July 2019 It's called heme, an iron-containing molecule that all animals and plants have. CBS News, "Are plant-based meats actually healthier than meat?," 3 July 2019 Dryness: The lunar samples proved to be extremely dry and almost entirely depleted of volatiles—elements or molecules with low boiling points that easily evaporate, such as water, carbon dioxide, nitrogen and hydrogen. Erica Jawin, Scientific American, "Apollo’s Bounty: The Science of the Moon Rocks," 2 July 2019 If those molecules aren’t released into the atmosphere, the result is negative emissions. Akshat Rathi, Quartz, "A tiny tweak in California law is creating a strange thing: carbon-negative oil," 1 July 2019 The company's secret weapon is heme — an iron-containing molecule found in plants and animals that, according to Impossible, is responsible for meat's flavor and aroma. CNN, "Impossible made fake meat a hot commodity. Now it could be a victim of its own success," 27 June 2019 However, the helmet itself is made from much larger molecules with chains of atoms a hundred times longer than regular plastic. David Hambling, Popular Mechanics, "The Century-Long Evolution of the U.S. Army Helmet," 27 June 2019 Previously, Curiosity detected carbon-containing molecules in ancient sediments on Mars as well as seasonal shifts in the levels of atmospheric methane. David Freeman, NBC News, "NASA's Curiosity Mars rover detects 'unusually high' levels of methane," 24 June 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

12 Jul 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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