The Collaborative International Dictionary of English v.0.48:

Zamia \Za"mi*a\, n. [L. zamia a kind of fir cone, from Gr. ?, ?,
   hurt, damage. See Plin. xvi. 44.] (Bot.)
   A genus of cycadaceous plants, having the appearance of low
   palms, but with exogenous wood. See Coontie, and Illust. of
   Strobile.
   [1913 Webster]

WordNet (r) 3.0 (2006):

zamia
    n 1: any of various cycads of the genus Zamia; among the
         smallest and most verdant cycads