cystidean
English edit
Etymology edit
Noun edit
cystidean (plural cystideans)
- (zoology, obsolete) Any of the †Cystidea, a class of extinct echinoderms, now known as the †Cystoidea.
- (zoology) A stage in the development of many crinoids after the free-swimming larva attaches to a surface, but before it develops the structures necessary to feed.