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
Kayla Dwyer, IndyStar, 2 July 2025
Polymers are chemical compounds with long chains of large and repetitive molecular units called monomers, and are known for being flexible and durable.
—Kristen Rogers, CNN Money, 1 July 2025
Rachel Treisman, NPR, 10 July 2025
Public water systems are expected to monitor these chemicals for three years and be fully compliant by 2029.
—Jordan King, MSNBC Newsweek, 10 July 2025
See All Example Sentences for chemical
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Adjective
This plant contains hundreds of chemical substances known as cannabanoids.
—Kayla Dwyer, IndyStar, 2 July 2025
Polymers are chemical compounds with long chains of large and repetitive molecular units called monomers, and are known for being flexible and durable.
—Kristen Rogers, CNN Money, 1 July 2025
Noun
Floodwaters may also contain hazardous household chemicals, waste and debris.
—Rachel Treisman, NPR, 10 July 2025
Public water systems are expected to monitor these chemicals for three years and be fully compliant by 2029.
—Jordan King, MSNBC Newsweek, 10 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 21 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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