I. ˈsefələ̇n noun
( -s )
Etymology: New Latin Cephalina
: a gregarine trophozoite complete with epimerite and usually attached to the cells of the host — compare sporadin
II. noun
( -s )
Etymology: International Scientific Vocabulary cephal- + -in; originally formed as German kephalin
: any of various acidic phosphatides that are similar to lecithins but contain ethanolamine, serine, or inositol instead of choline, occur especially in the nervous tissue of the brain, and have marked thromboplastic activity