资料来源 : pyDict

尿囊素

资料来源 : Webster's Revised Unabridged Dictionary (1913)

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.