E1K5T1E1X8I1N1E1
19 points
EKTEXINE is validvalid
an outer layer of the exine [n EKTEXINES]
an outer layer of the exine, the tough outer wall of a pollen grain [n -S]
an outer layer of the exine [n EKTEXINES]
an outer layer of the exine, the tough outer wall of a pollen grain [n -S]