The Collaborative International Dictionary of English v.0.48:
Micaceous \Mi*ca"ceous\, a. [Cf. F. micac['e].] Pertaining to, or containing, mica; splitting into laminae or leaves like mica. [1913 Webster]WordNet (r) 3.0 (2006):
micaceous adj 1: hydrous silicates of or relating to or resembling mica