chemical –noun
1.
a substance produced by or used in a chemical process.
2.
chemicals, Slang. narcotic or mind-altering drugs or substances.
–adjective
3.
of, used in, produced by, or concerned with chemistry or chemicals: a chemical formula; chemical agents.
4.
used in chemical warfare: chemical weapons.
Origin:
1570–80; chemic + -al1; r. chimical chemic
