Auxotroph
a mutant organism, especially a microorganism, that has a nutritional requirement not shared by the parent organism.
compare prototroph (def 1).
noun
a mutant strain of microorganism having nutritional requirements additional to those of the normal organism
auxotroph aux·o·troph (ôk’sə-trŏf’, -trōf’)
n.
a mutated microorganism having nutritional requirements that differ from those of unmutated microorganisms from the same strain.
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