[awk-suh-trof, -trohf]

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 auxotroph



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

auxotroph in Medicine


[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.