As a noun exine
is the outer layer of a pollen grain or spore; the exosporium.
As a verb exing is
present participle of ex.
exine
English
Noun
(
en noun)
(botany, palynology) the outer layer of a pollen grain or spore; the exosporium
Coordinate terms
*intine
Derived terms
*ektexine
*endexine
*exinal
*nexine
*sexine
exing
English
Verb
(head)