Allantoin

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Allantoin \Al*lan"to*in\, n. (Chem.)
     A crystalline, transparent, colorless substance found in the
     allantoic liquid of the fetal calf; -- formerly called
     allantoic acid and amniotic acid.
     [1913 Webster] Allantois