a mutant organism, especially a microorganism, that has a nutritional requirement not shared by the parent organism.
Compare prototroph (def 1).
a mutant strain of microorganism having nutritional requirements additional to those of the normal organism
auxotrophic aux·o·troph·ic (awk-sō-trŏf’ĭk)
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.
auxotroph aux·o·troph (ôk’sə-trŏf’, -trōf’)
A mutated microorganism having nutritional requirements that differ from those of unmutated microorganisms from the same strain.
the eleventh month of the Jewish calendar. arteriovenous. atrioventricular. audiovisual. avenue. average. avoirdupois weight. atrioventricular. audiovisual. Also, a.v. ad valorem. audiovisual. Artillery Volunteers. audiovisual. Authorized Version (of the Bible). Contemporary Examples The fast of the Ninth of Av is not intended to decry only past pain (though that too) but present political misdeeds. Today’s Lamentations […]
Aubrey Vincent, 1872–98, English illustrator. Contemporary Examples Uncertain and all of 19, tall and striking Marion “Mimi” Beardsley rode the train from Trenton, N.J.. Intern’s Memoir Details Affair With President Kennedy Matthew DeLuca February 6, 2012 The last time Beardsley saw the president was in mid-November 1963. Intern’s Memoir Details Affair With President Kennedy Matthew […]
Alfred Victor de [al-fred veek-tawr duh] /alˈfrɛd vikˈtɔr də/ (Show IPA), 1797–1863, French poet, novelist, and dramatist. Historical Examples Vigny married an English wife, knew something of England, and a good deal of English literature. A History of the French Novel, Vol. 2 George Saintsbury Wealth and versatility of imagination were not Vigny’s gifts. A […]
- Ambrose hill
Ambrose Powell [pou-uh l] /ˈpaʊ əl/ (Show IPA), 1825–65, Confederate general in the U.S. Civil War. Archibald Vivian [viv-ee-uh n] /ˈvɪv i ən/ (Show IPA), 1886–1977, English physiologist: Nobel Prize in Medicine 1922. James Jerome, 1838–1916, U.S. railroad builder and financier, born in Canada. Joe, 1879–1915, U.S. labor organizer and songwriter, born in Sweden. noun […]