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]WordNet (r) 3.0 (2006):
gymnosperm n 1: plants of the class Gymnospermae having seeds not enclosed in an ovary