[bahy-oh] Informal.
noun, plural bios.
biological: a bio control service using praying mantises to reduce the population of garden pests.

1945–50; by shortening; as adj., independent use of bio-, taken as a free form Unabridged


a combining form meaning “life” occurring in loanwords from Greek (biography ); on this model, used in the formation of compound words (bioluminescence ).
Also, especially before a vowel, bi-.

combining form of Greek bíos life; akin to Latin vīvus living, Sanskrit jīvas. See quick Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
bio (ˈbaɪəʊ)
n , pl bios
short for biography

bio- or (before a vowel) bi-
combining form
1.  indicating or involving life or living organisms: biogenesis; biolysis
2.  indicating a human life or career: biography; biopic
[from Greek bios life]
bi- or (before a vowel) bi-
combining form
[from Greek bios life]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

from Gk. bio-, comb. form of bios "one's life, course or way of living, lifetime" (as opposed to zoe "animal life, organic life"), from PIE base *gweie- "to live" (cf. Skt. jivah "alive, living;" O.E. cwic "alive;" L. vivus "living, alive," vita "life;" M.Pers. zhiwak "alive;" O.C.S. zivo "to live;"
Lith. gyvas "living, alive;" O.Ir. bethu "life," bith "age;" Welsh byd "world"). Equivalent of L. vita. The correct usage is that in biography, but in modern science it has been extended to mean "organic life."

short for biography, attested from 1961.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

bio- or bi-

  1. Life; living organism: biology.

  2. Biology; biological: biophysics.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Abbreviations & Acronyms
  1. biographical summary

  2. biology

Biotechnology Industry Organization
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Diverting land from food crops to making bio diesel however efficiently,
  doesn't seem credible to me.
The barriers to a bio-based fuel supply start way before cellulosic ethanol
  plants are built and global policy is crafted.
Vaporizing sawdust and corn stalks yields a versatile petroleum stand-in called
The concept of bio-fuel does potentially make sense if implemented
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