S / spīnŭla
noun

spīnŭla

gen. spīnŭlae · gender feminine · decl. 1st
dim. spina (post-class.).
A little thorn
A little thorn, Arn. 2, 49.—*
A little backbone; spine
(Acc. to spina, I. B. 3.) A little backbone or spine, App. M. 10, p. 255, 2.