noun
also stur·in ˈstər.ˌēn, -ər.ə̇n, ˈst(y)u̇ˌrēn, -u̇rə̇n
( -s )
Etymology: International Scientific Vocabulary stur- (from New Latin sturio — specific epithet of the sturgeon Acipenser sturio — , from Medieval Latin, sturgeon, of Germanic origin; akin to Old High German sturio sturgeon) + -ine or -in
: a protamine in the spermatozoa of sturgeon