from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Having the same metabolic capabilities and nutritional requirements as the wild type parent strain: prototrophic bacteria.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of or pertaining to a prototroph or to prototrophy

from The Century Dictionary and Cyclopedia

  • Requiring for growth only simple inorganic substances, as carbon dioxid and ammonia or nitrous acid and a few mineral salts: a term used by A. Fischer to designate a group of nitrifying bacteria characterized by a very primitive metabolism. Compare metatrophic and paratrophic.


Sorry, no etymologies found.


  • The enormous extension of surface also facilitates the absorption of energy from the environment, and, to take one case only, it is impossible to doubt that some source of radiant energy must be at the disposal of those prototrophic forms which decompose carbonates and assimilate carbonic acid in the dark and oxidize nitrogen in dry rocky regions where no organic materials are at their disposal, even could they utilize them.

    Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy"

  • He begins his study of life and its evolution by considering how nutrition and the derivation of energy can have taken place before chlorophyl had come into existence; and he very pertinently points to the _prototrophic_ bacteria as probably representing "the survival of a primordial stage of life chemistry."

    Science and Morals and Other Essays

  • Histidine prototrophic spores were tested for production of HA-Sec9p by western blotting using antibodies against HA.

    PLoS ONE Alerts: New Articles

  • Translocation frequency was determined by dividing the number of histidine prototrophic colonies by the total number of viable cells plated.

    PLoS ONE Alerts: New Articles


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