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 The existing control lists are much narrower than the one used by the U.S., staying limited to materials that could be used for nuclear, chemical or biological weapons, Ren said. Fortune, "China is set to pass law restricting the export of sensitive technology," 16 Oct. 2020 But the evil spirits lurking in the background of his latest film are a real-life horror from the country’s past — the Imperial Army’s testing of biological and chemical weapons on human subjects in Manchuria before and during World War II. Ben Dooley, New York Times, "A Famed Horror Director Mines Japan’s Real-Life Atrocities," 10 Oct. 2020 Minek’s approach, for example, is to make what amount to abstract paintings by exposing color photographic paper to light and chemical reactions. Steven Litt, cleveland, "Transformer Station explores ‘unique objects’ made from photographs and lush nocturnal landscapes of Cleveland," 27 Sep. 2020 He was hired in 1963 as a securities analyst at Fidelity and initially wrote research reports on pharmaceutical and chemical companies. James R. Hagerty, WSJ, "Contrarian Money Manager Didn’t Always Bet Against Crowd," 25 Sep. 2020 It will be led by Daniel Shantz, chemical and biomolecular engineering professor and the Entergy chair in clean energy engineering. Staff Report, NOLA.com, "Tulane researches natural gas; Xavier created humanities minor; and more metro college news," 16 Sep. 2020 Burn pits were used to incinerate and burn all sorts of waste, hazardous material and chemical compounds at military sites throughout Iraq and Afghanistan. Allen Kim, CNN, "Jon Stewart says Congress is abandoning veterans who inhaled toxic burn pit fumes," 15 Sep. 2020 Courtesy of Macy's Physical and chemical exfoliants work together to soften rough, dry skin. Erica Metzger, Better Homes & Gardens, "2020 Beauty Awards: Body Products That We Love," 11 Sep. 2020 So far, there hasn't been much discussion of materials that solve both the chemical and structural issues. John Timmer, Ars Technica, "Could “disordered rock salts” bring order to next-gen lithium batteries?," 4 Sep. 2020 Recent Examples on the Web: Noun Clinics have run into bottlenecks of specialized cotton swabs, plastic tubes, and chemical reagents. Katherine Ellen Foley, Quartz, "Can rapid antigen tests fix contact tracing in the US?," 14 Oct. 2020 That added complexity, cost, and time, and put a strain on scarce chemical reagents. Robert F. Service, Science | AAAS, "New test detects coronavirus in just 5 minutes," 8 Oct. 2020 The labs will use the same chemical reagents and follow the same protocols to assess the neutralizing antibody levels found in the blood of those who are inoculated with the various vaccine candidates. Jeremy Kahn, Fortune, "Which COVID-19 vaccine works best? A new lab network promises an answer," 6 Oct. 2020 Emergency room staff in at least one Alta hospital lacked chemical reagents needed to perform critical enzyme tests on heart attack patients, according to another former Alta executive who sued the company. Peter Elkind, ProPublica, "Investors Extracted $400 Million From a Hospital Chain That Sometimes Couldn’t Pay for Medical Supplies or Gas for Ambulances," 30 Sep. 2020 And in some children, the virus can cause their immune system to overreact, creating inflammation and unleashing a cascade of chemical reactions known as a cytokine storm, which wreaks havoc within the body. Dr. Sanjay Gupta, CNN, "5 common coronavirus misconceptions and the science you need to know," 26 Sep. 2020 Precisely simulating all but the simplest chemical reactions is mathematically intractable for any non-quantum computer, no matter how huge. The Economist, "Uncertainty principals Commercialising quantum computers," 26 Sep. 2020 With tens of thousands of tests coming in each day, Dr. Cohen’s team also needs to manage a host of other variables, including sample shipment schedules, supplies of the chemical reagents needed to process tests, staffing timetables and hiring. Scott Patterson, WSJ, "Labs Struggled With Surge in Covid-Testing Demand; How One Made It Through," 6 Sep. 2020 But problems with their chemical reagents and overly strict testing criteria caused major setbacks. Tanya Lewis, Scientific American, "COVID-19 Spit Tests Used by NBA Are Now Authorized by FDA," 20 Aug. 2020

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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Time Traveler for chemical

Time Traveler

The first known use of chemical was in 1576

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Statistics for chemical

Last Updated

20 Oct 2020

Cite this Entry

“Chemical.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chemical. Accessed 31 Oct. 2020.

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More Definitions for chemical

chemical

adjective
How to pronounce chemical (audio)

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

More from Merriam-Webster on chemical

Nglish: Translation of chemical for Spanish Speakers

Britannica English: Translation of chemical for Arabic Speakers

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