[ bahy-oh ]
/ ˈbaɪ oʊ /

noun, plural bi·os.


biological: a bio control service using praying mantises to reduce the population of garden pests.

Origin of bio

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

Definition for bio (2 of 2)


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-.

Origin of bio-

combining form of Greek bíos life; akin to Latin vīvus living, Sanskrit jīvas. See quick Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for bio

British Dictionary definitions for bio (1 of 2)

/ (ˈbaɪəʊ) /

noun plural bios

short for biography

British Dictionary definitions for bio (2 of 2)


before a vowel bi-

combining form

indicating or involving life or living organismsbiogenesis; biolysis
indicating a human life or careerbiography; biopic

Word Origin for bio-

from Greek bios life
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

Medical definitions for bio



Life; living organism:biology.
Biology; biological:biophysics.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.