a. [f. TALC + -OUS.] Of the nature of talc; talcose.
1735. Phil. Trans., XXXIX. 40. Shining Talcous Laminæ are to be seen in the Liquor.
1777. G. Forster, Voy. round World, I. 149. A kind of brown talcous clay-stone.
1852. Th. Ross, Humboldt’s Trav., III. xxv. 65. A gneiss passing into micaceous and talcous slate.
