• (n.) A substance allied to alkali albumin and to mucin, present in semen, to which it is said to impart the mucilaginous character.
Sper'ma·tin noun (Physiol. Chem.) A substance allied to alkali albumin and to mucin, present in semen, to which it is said to impart the mucilaginous character. 
Type: Term Pronunciation: sper′mă-tin Definitions: 1. An albuminoid in the seminal fluid.