chemical

adjective
chem·​i·​cal | \ ˈke-mi-kəl How to pronounce chemical (audio) \

Definition of chemical

 (Entry 1 of 2)

1 : of, relating to, used in, or produced by chemistry or the phenomena of chemistry chemical reactions
2a : acting or operated or produced by chemicals a chemical fire extinguisher
b : detectable by chemical means

chemical

noun

Definition of chemical (Entry 2 of 2)

1 : a substance obtained by a chemical process or producing a chemical effect

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Other Words from chemical

Adjective

chemically \ ˈke-​mi-​k(ə-​)lē How to pronounce chemically (audio) \ adverb

Examples of chemical in a Sentence

Adjective

They studied the compound's chemical structure.

Recent Examples on the Web: Adjective

Bloom’s fuel cells combine fuel and hot air to produce a chemical reaction that creates electricity without any burning. Thy Vo, The Mercury News, "Bloom Energy sues Santa Clara for undermining its technology," 13 June 2019 Be a chemical engineer, a poet, a safari guide, an artist, a nurse, a pastry chef, a politician, a teacher, or maybe all of the above. Steve Smith, courant.com, "Rockville Grads Urged To Reshape The Future," 14 June 2019 The family moved a lot during the early years because her father was a chemical engineer who worked for ammunition companies during World War II. San Diego Union-Tribune, "Elizabeth Barrett-Connor, a UCSD researcher who transformed the treatment of heart disease, dies at 84," 12 June 2019 So the host rather impulsively hires Molly Patel (Kaling), a longtime fan -- and most significantly in Katherine's eyes, woman of color -- who has been working for a chemical plant but is resourceful enough to secure an interview. Brian Lowry, CNN, "Mindy Kaling's 'Late Night' pulls back the curtain on late-night TV," 7 June 2019 Similar laws passed in other states to require chemical castration are rarely used, Marshall said. The Washington Post, The Denver Post, "Alabama governor signs “chemical castration” bill for some sex offenders," 11 June 2019 By linking the trees’ spectral signatures to their chemical makeup, the two scientists created the most detailed maps of forests yet devised. Paul Tullis, New York Times, "To Map a Coral Reef, Peel Back the Seawater," 10 June 2019 Aphids also squash easily and that sends a chemical signal to all things that eat them as well. oregonlive.com, "‘Little buggers,’ aphids, are munching on broccoli and kale – what can I do? Ask an expert," 7 June 2019 To learn more about Pilot Chemical Company and its wide variety of chemical products, visit www.pilotchemical.com. Jessica Levy, Cincinnati.com, "STEM and non-STEM employees alike power Pilot Chemical Company," 7 June 2019

Recent Examples on the Web: Noun

Tokyo last week tightened the approval process for Japanese shipments of photoresists and other sensitive materials to South Korean companies, which need the chemicals to produce semiconductors and display screens used in TVs and smartphones. Washington Post, "South Korea seeks US help in bitter trade spat with Japan," 11 July 2019 These are tinctures, made from immersing plants in alcohol or another substance for weeks, until the liquid absorbs the medicinal chemicals from the plant. Zoe Greenberg, BostonGlobe.com, "Making medicine on the mountain," 10 July 2019 But when the two are mixed together, the chemicals combine in a way to precipitate out of the water. USA TODAY, "Ink library, parking barnacles, lunar training grounds: News from around our 50 states," 9 July 2019 Lab studies on methylisothiazolinone indicate that the chemical may also be neurotoxic in vitro — or, carry potential to damage developing nervous systems. Stephie Grob Plante, Vox, "Some people held in border detention centers are being forced to bathe themselves with shampoo. The issue is far bigger than personal hygiene.," 3 July 2019 The results suggest cockroaches are quickly evolving resistance to the three chemicals tested. Caitlin O'kane, CBS News, "Cockroaches are becoming almost impossible to kill as they build resistance to insecticides, study finds," 2 July 2019 Fire officials said in a tweet that the chlorine pump that spilled the chemical was shut down and was not leaking, and the community center would hire an outside company to clean up the spill. Alex Riggins, San Diego Union-Tribune, "Chlorine spill prompts evacuations from University City community pool; no injuries reported," 1 July 2019 And the harm caused by microplastics may extend beyond the particles themselves: In the lab, researchers have found that the chemicals leaching out of microplastics may be compromising oceanic oxygen-making bacteria. Matt Simon, WIRED, "How Remote Lakes Could Help Unravel the Mysteries of Microplastic," 1 July 2019 Some studies in animals showed that long-term exposure to the chemical increased the animal's risk for skin cancer. Jen Christensen, CNN, "Study links common chemical in cosmetics and toothpaste to osteoporosis," 25 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'chemical.' 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 chemical

Adjective

1576, in the meaning defined at sense 1

Noun

1739, in the meaning defined at sense 1

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Statistics for chemical

Last Updated

13 Jul 2019

Look-up Popularity

Time Traveler for chemical

The first known use of chemical was in 1576

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More Definitions for chemical

chemical

adjective

English Language Learners Definition of chemical

 (Entry 1 of 2)

: of or relating to chemistry
: working by means of chemicals

chemical

noun

English Language Learners Definition of chemical (Entry 2 of 2)

: a substance (such as an element or compound) that is made by a chemical process

chemical

adjective
chem·​i·​cal | \ ˈke-mi-kəl How to pronounce chemical (audio) \

Kids Definition of chemical

 (Entry 1 of 2)

: of or relating to chemistry or chemicals

Other Words from chemical

chemically adverb

chemical

noun

Kids Definition of chemical (Entry 2 of 2)

: any substance (as an acid) that is formed when two or more other substances act upon one another or that is used to produce a change in another substance

chemical

adjective
chem·​i·​cal | \ ˈkem-i-kəl How to pronounce chemical (audio) \

Medical Definition of chemical

 (Entry 1 of 2)

1 : of, relating to, used in, or produced by chemistry
2a : acting or operated or produced by chemicals
b : detectable by chemical means

Other Words from chemical

chemically \ -​i-​k(ə-​)lē How to pronounce chemically (audio) \ adverb

chemical

noun

Medical Definition of chemical (Entry 2 of 2)

1 : a substance (as an element or chemical compound) obtained by a chemical process or used for producing a chemical effect

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More from Merriam-Webster on chemical

Spanish Central: Translation of chemical

Nglish: Translation of chemical for Spanish Speakers

Britannica English: Translation of chemical for Arabic Speakers

Comments on chemical

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