perine Bot.
(ˈpɛraɪn)
[ad. mod.L. perinium (Strasburger 1882), f. peri-, app. after extine, intine.]
The outermost coat of a pollen-grain or spore when there are three (intine, extine or exine, and perine).
| 1895 Kerner & Oliver Nat. Hist. Plants (1902) II. 100 The wall of pollen-grains is, as a rule, three-layered. These three layers are:—the internal one or intine, the middle one or extine, and the external one or perine... The various sculpturings, prickles, and other unevennesses of the outer coat really appertain to the perine. |