S / spīnus
noun

spīnus

gen. spīni · gender feminine · decl. 2nd
(abl. spinu, Varr. ap. Charis. p. 117 P.), id.
a blackthorn; sloe-tree
a blackthorn, sloe-tree: Prunus spinosa, Linn.; Verg. G. 4, 145; Pall. Febr. 25, 6; id. Insit. 63.