The Collaborative International Dictionary of English v.0.48:
Copulatory \Cop"u*la*to*ry\ (k[o^]p"[-u]*l[.a]*t[-o]*r[y^]), a. 1. Pertaining to copulation; tending or serving to unite; copulative. [1913 Webster] 2. (Zool.) Used in sexual union; as, the copulatory organs of insects. [1913 Webster]WordNet (r) 3.0 (2006):
copulatory adj 1: of or relating to coitus or copulation [syn: coital, copulatory]