spi·nes·cent 
(spī-nĕsənt)
(spī-nĕsənt)adj.
Biology
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·nescence n.