ˈekˌs]ēn, ]īn noun
also ex·tine ˈekˌst]\
( -s )
Etymology: exine probably from German, from Latin ex out of, out; extine probably modification of German exine — more at ex-
: the outer of the two layers forming the wall of certain spores (as pollen grains) — called also exosporium ; compare intine , perinium