spīnus, i (abl. spinu, Varr. ap. Charis. p. 117 P.), f. [spina],
a blackthorn , sloe-tree : Prunus spinosa, Linn.; Verg. G. 4, 145; Pall. Febr. 25, 6; id. Insit. 63.
spīnus ī, f SPI-, a blackthorn, sloe-tree , V. ...
An Elementary Latin Dictionary