[ kem-i-kuh l ]
/ ˈkɛm ɪ kəl /


a substance produced by or used in a chemical process.
chemicals, Slang. narcotic or mind-altering drugs or substances.


of, used in, produced by, or concerned with chemistry or chemicals: a chemical formula; chemical agents.
used in chemical warfare: chemical weapons.

Origin of chemical

1570–80; chemic + -al1; replacing chimical chemic

Related forms Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for chemically

British Dictionary definitions for chemically


/ (ˈkɛmɪkəl) /


any substance used in or resulting from a reaction involving changes to atoms or molecules, especially one derived artificially for practical use


of or used in chemistrychemical balance
of, made from, or using chemicalschemical fertilizer

Derived Forms

chemically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for chemically


[ kĕmĭ-kəl ]


Of or relating to chemistry.
Of or relating to the properties or actions of chemicals.


A substance with a distinct molecular composition that is produced by or used in a chemical process.
A drug, especially an illicit or addictive one.

Related forms

chemi•cal•ly adv.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for chemically


[ kĕmĭ-kəl ]


Relating to or produced by means of chemistry.


A substance having a specific molecular composition, obtained by or used in a chemical process.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.