n m. an unfledged bird, a nestling: esen .i. es ┐ en. es didiu fo diultad, essen didiu ni hen chadacht no ni hen clumda cedacht not yet a bird, or not yet a fledged bird YBL 265c9 = Corm. Y 511 . a n-isseniu (gl. pullos suos) Ml. 80a6 [leg. eiss- ?]. amail esene fiach unfledged ravens Corm. Y 731 . ni frithidi bid esine éim (.i. ni hinann so ┐ eun do gabail a sás), ZCP ix 141 x = TBC-I¹ 797 (frithid bid eissine). go luth eisine with (but) the vigour of a nestling Anecd. ii 21.1 . il-leith eiseine, 22.24 . téit in banchorr isin fairrgi síar do duth, co toét cona heisínib essi, Triads 237 . Cf. intī nar leic essin mil maigi do sil T. `never yielded even the leveret of a hare' Cog. 66.11 (éis an ghiuilgennaigh v.l.).