The Collaborative International Dictionary
Nidamental
Nidamental \Nid`a*men"tal\, a. [L. nidamentum materials for a nest, fr. nidus nest. See Nest.] (Zo["o]l.) Of, pertaining to, or bearing, eggs or egg capsules; as, the nidamental capsules of certain gastropods; nidamental glands. See Illust. of Dibranchiata.
Wiktionary
nidamental
a. (context anatomy English) (non-gloss definition: Used to describe an internal organ, in some elasmobranchs and molluscs, that secretes egg cases or the gelatinous covering of eggmass.)