gymnosperm

from WordNet (r) 3.0 (2006)

gymnosperm
    n 1: plants of the class Gymnospermae having seeds not enclosed
         in an ovary

from The Collaborative International Dictionary of English v.0.48

Gymnosperm \Gym"no*sperm\ (j[i^]m"n[-o]*sp[~e]rm), n. (Bot.)
   A plant that bears naked seeds (i. e., seeds not inclosed in
   an ovary), as the common pine and hemlock. Cf. {Angiosperm}.
   [1913 Webster]