nidamental

from The Collaborative International Dictionary of English v.0.48

Nidamental \Nid`a*men"tal\, a. [L. nidamentum materials for a
   nest, fr. nidus nest. See {Nest}.] (Zool.)
   Of, pertaining to, or bearing, eggs or egg capsules; as, the
   nidamental capsules of certain gastropods; nidamental glands.
   See Illust. of {Dibranchiata}.
   [1913 Webster]