[ awk-suh-trof, -trohf ]
/ ˈɔk səˌtrɒf, -ˌtroʊf /

noun Biology.

a mutant organism, especially a microorganism, that has a nutritional requirement not shared by the parent organism.Compare prototroph(def 1).

Origin of auxotroph

1950–55; back formation from auxotrophic; see auxo-, trophic
Related formsaux·o·troph·ic, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for auxotrophic


/ (ˈɔːksətrəʊf) /


a mutant strain of microorganism having nutritional requirements additional to those of the normal organism
Derived Formsauxotrophic, adjective
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

Medicine definitions for auxotrophic (1 of 2)


[ awk-sō-trŏfĭk ]


Requiring one or more specific substances for growth and metabolism that the parent organism was able to synthesize on its own. Used with respect to organisms, such as strains of bacteria, algae, or fungi, that can no longer synthesize certain growth factors because of mutational changes.

Medicine definitions for auxotrophic (2 of 2)


[ ôksə-trŏf′, -trōf′ ]


A mutated microorganism having nutritional requirements that differ from those of unmutated microorganisms from the same strain.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.