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  1. the science dealing with the chemistry of living matter.
  2. the chemistry of living matter.

Origin of biochemistry

First recorded in 1880–85; bio- + chemistry
Related formsbi·o·chem·i·cal [bahy-oh-kem-i-kuh l] /ˌbaɪ oʊˈkɛm ɪ kəl/, adjective, nounbi·o·chem·ic, adjectivebi·o·chem·i·cal·ly, adverbbi·o·chem·ist, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for biochemistry


  1. the study of the chemical compounds, reactions, etc, occurring in living organisms
Derived Formsbiochemical, adjectivebiochemically, adverbbiochemist, noun
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

Word Origin and History for biochemistry


also bio-chemistry, 1857, from bio- + chemistry.

Online Etymology Dictionary, © 2010 Douglas Harper

biochemistry in Medicine


  1. The study of the chemical substances and vital processes occurring in living organisms.
  2. The chemical composition of a particular living system or biological substance.
Related formsbi′o•chemi•cal (-ĭ-kəl) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

biochemistry in Science


  1. The scientific study of the chemical composition of living matter and of the chemical processes that go on in living organisms.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

biochemistry in Culture


The study of the structure and interactions of the complex organic molecules (see also organic molecule) found in living systems.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.