zooxanthinhttp://www.oed.com/dictionary/zooxanthin_n%3Ftab%3Dmeaning_and_usezooxanthin, n.
Revised 2017

zooxanthinnoun

  1. 1868–
    A yellow carotenoid pigment found in the plumage of certain birds.
    1. 1868
      Zooxanthin, the colouring-matter of the red feathers of Calurus auriceps.
      H. Watts, Dictionary of Chemistry vol. V. 1085
    2. 1937
      This appearance is a characteristic of the yellow zooxanthin of these birds.
      Auk vol. 54 422
    3. 2014
      Nonpeptidic toxins have been identified,..as well as compounds related to pigments (i.e., zooxanthin).
      L. M. Botana, Seafood & Freshwater Toxins iv. 84

Originally published as part of the entry for zoo-, comb. form

zoo-, comb. form was revised in June 2017.