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chemical

[kem-i-kuh l] /ˈkɛm ɪ kəl/
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
1570-1580
1570-80; chemic + -al1; replacing chimical chemic
Related forms
chemically, adverb
nonchemical, adjective, noun
prechemical, adjective
pseudochemical, adjective
semichemical, adjective
semichemically, adverb
superchemical, adjective, noun
superchemically, adverb
unchemical, adjective
unchemically, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for semichemical

chemical

/ˈkɛmɪkəl/
noun
1.
any substance used in or resulting from a reaction involving changes to atoms or molecules, especially one derived artificially for practical use
adjective
2.
of or used in chemistry chemical balance
3.
of, made from, or using chemicals chemical 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
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Word Origin and History for semichemical

chemical

adj.

1570s, "relating to chemistry," from chemic "of alchemy" (a worn-down derivative of Medieval Latin alchimicus; see alchemy) + -al (1). In early use also of alchemy. Related: Chemically.

n.

1747, from chemical (adj.). Related: Chemicals.

Online Etymology Dictionary, © 2010 Douglas Harper
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semichemical in Medicine

chemical chem·i·cal (kěm'ĭ-kəl)
adj.
Abbr. chem.

  1. Of or relating to chemistry.

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

n.
  1. A substance with a distinct molecular composition that is produced by or used in a chemical process.

  2. A drug, especially an illicit or addictive one.


chem'i·cal·ly adv.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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semichemical in Science
chemical
  (kěm'ĭ-kəl)   
Adjective  Relating to or produced by means of chemistry.

Noun  A substance having a specific molecular composition, obtained by or used in a chemical process.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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