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[bahy-uh-loj-i-kuh l] /ˌbaɪ əˈlɒdʒ ɪ kəl/
pertaining to biology.
of or relating to the products and operations of applied biology:
a biological test.
Pharmacology. any substance, as a serum or vaccine, derived from animal products or other biological sources and used to treat or prevent disease.
Also, biologic.
Origin of biological
1855-60; biolog(y) + -ical
Related forms
biologically, adverb
nonbiological, adjective
nonbiologically, adverb
pseudobiological, adjective
pseudobiologically, adverb
semibiologic, adjective
semibiological, adjective
semibiologically, adverb
unbiological, adjective
unbiologically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for biological
  • The answer to it cannot be a straightforward technical or biological one because food is basic to life.
  • But what is emerging from this research is a cluster of biological markers that plant the bad seed in the brain.
  • Yet the three populations have evolved different biological adaptations for surviving in oxygen-thin air, a new report says.
  • The biological urge is too strong to resist for penguin chicks as they fledge and dive into the water for the first time.
  • New waterfall boxes combine a waterfall and biological filter in a single box.
  • The biological legacy of childhood poverty may linger for decades, leaving adults who grew up poor more likely to get sick.
  • There may be opportunities for teaching more advanced courses in the biological sciences and genetics.
  • But not all, and the stockpile cannot protect against biological agents authorities haven't seen or don't expect.
  • biological controls use pests' natural enemies against them.
  • The fact that is has a social effect does not decline from the biological aspect, they are one in the same.
British Dictionary definitions for biological


of or relating to biology
(of a detergent) containing enzymes said to be capable of removing stains of organic origin from items to be washed
(usually pl) a drug, such as a vaccine, that is derived from a living organism
Derived Forms
biologically, 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 biological

1840, from biology + -ical. Biological clock attested from 1955; not especially of human reproductive urges until c.1991. Related: Biologically.

Online Etymology Dictionary, © 2010 Douglas Harper
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biological in Medicine

biological bi·o·log·i·cal (bī'ə-lŏj'ĭ-kəl)

  1. Of, relating to, caused by, or affecting life or living organisms.

  2. Having to do with biology.

  3. Related by blood, as in a child's biological parents.

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