Also found in: Medical.


adj. Biology
1. Having a spine or spines.
2. Terminating in a spine.

[Late Latin spīnēscēns, spīnēscent-, present participle of spīnēscere, to become thorny, from Latin spīna, thorn.]

spi·nes′cence n.
References in periodicals archive ?
Although named for the unarmed petiole, petiole spinescence varies, and
Experimental evidence suggests that spinescence deters feeding by vertebrates and that it could increase under selective pressure exerted by browsing animals (Obeso, 1997).
The induction of spinescence in European holly leaves by browsing ungulates.