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
Leanne Potts, Better Homes & Gardens, 26 June 2025
The legislation would, however, allow SWAT team members to cover their faces, along with law enforcement who need to cover uniforms for wildfire gear, or wear medical-grade masks over their faces if there is an airborne threat like smoke, a chemical agent or a virus.
—Alex Stone, ABC News, 25 June 2025
Paul Iddon, Forbes.com, 16 June 2025
Chemical Control Options Spraying the foliage of any vine that is covering a shrub or is surrounded by desirable landscape plants with any type of chemical or natural herbicide like vinegar is not practical.
—Mary Marlowe Leverette, Southern Living, 14 June 2025
See All Example Sentences for chemical
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Adjective
In addition to serving as a DIY natural fertilizer, benefits of reusing rice water include reducing water waste and the need for chemical fertilizers.
—Leanne Potts, Better Homes & Gardens, 26 June 2025
The legislation would, however, allow SWAT team members to cover their faces, along with law enforcement who need to cover uniforms for wildfire gear, or wear medical-grade masks over their faces if there is an airborne threat like smoke, a chemical agent or a virus.
—Alex Stone, ABC News, 25 June 2025
Noun
In 1987-88, the Iranian population and leadership alike truly feared that Saddam would saturate the country’s major population centers with lethal chemical agents, either dropped by warplanes or fitted atop his missiles.
—Paul Iddon, Forbes.com, 16 June 2025
Chemical Control Options Spraying the foliage of any vine that is covering a shrub or is surrounded by desirable landscape plants with any type of chemical or natural herbicide like vinegar is not practical.
—Mary Marlowe Leverette, Southern Living, 14 June 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 30 Jun. 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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