chem·i·cal
ˈke-mi-kəl 
1
: of, relating to, used in, or produced by chemistry or the phenomena of chemistry
chemical reactions
2
a
: acting or operated or produced by chemicals
a chemical fire extinguisher
b
: detectable by chemical means
1
: a substance obtained by a chemical process or producing a chemical effect
2
Examples of chemical in a Sentence
Adjective
They studied the compound's chemical structure.
Recent Examples on the Web
Ayesha Gulzar, Verywell Health, 21 July 2025
Besides, there is a chemical element at work: a good story triggers the release of dopamine and oxytocin in the brain, chemicals that enhance attention and recall.
—Esade Business & Law School, Forbes.com, 21 July 2025
Karoline Leonard, Austin American Statesman, 23 July 2025
Rinsing produce helps remove dirt, bacteria, pesticides, and other chemicals that can build up on foods during the harvesting and handling stages.
—Laura Schober, Health, 22 July 2025
See All Example Sentences for chemical
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Adjective
Glycine is an amino acid that can also act as an inhibitory neurotransmitter (a chemical messenger that calms brain activity).
—Ayesha Gulzar, Verywell Health, 21 July 2025
Besides, there is a chemical element at work: a good story triggers the release of dopamine and oxytocin in the brain, chemicals that enhance attention and recall.
—Esade Business & Law School, Forbes.com, 21 July 2025
Noun
The order also directed agencies to set standards for testing and to address chemical, biological, radiological, nuclear and cybersecurity risks.
—Karoline Leonard, Austin American Statesman, 23 July 2025
Rinsing produce helps remove dirt, bacteria, pesticides, and other chemicals that can build up on foods during the harvesting and handling stages.
—Laura Schober, Health, 22 July 2025
See All Example Sentences for chemical
Cite this Entry
“Chemical.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chemical. Accessed 29 Jul. 2025.
Copy CitationKids Definition
chemical
1 of 2 adjective
chem·i·cal
ˈkem-i-kəl
1
: of, relating to, used in, or produced by chemistry
2
: acting or operated or produced by chemicals
chemical
2 of 2 noun
: a substance (as an element or compound) obtained from a chemical process or used to get a chemical result
Medical Definition
chemical
1 of 2 adjective
chem·i·cal
ˈkem-i-kəl
1
: of, relating to, used in, or produced by chemistry
2
a
: acting or operated or produced by chemicals
b
: detectable by chemical means
chemical
2 of 2 noun1
: a substance (as an element or chemical compound) obtained by a chemical process or used for producing a chemical effect
2
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