The Collaborative International Dictionary of English v.0.48:
Spicate \Spi"cate\, Spicated \Spi"ca*ted\, a. [L. spicatus, p. p. of spicare furnish with spikes, or ears, fr. spica a spike, or ear.] (Bot.) Having the form of a spike, or ear; arranged in a spike or spikes. --Lee. [1913 Webster]WordNet (r) 3.0 (2006):
spicate adj 1: having or relating to spikes; "spicate inflorescence"