Talc(?), n. [F. talc; cf. Sp. & It. talco, LL. talcus; all fr. Ar. talq.] (Min.) A soft mineral of a soapy feel and a greenish, whitish, or grayish color, usually occurring in foliated masses. It is hydrous silicate of magnesia. Steatite, or soapstone, is a compact granular variety.
Indurated talc, an impure, slaty talc, with a nearly compact texture, and greater hardness than common talc; -- called also
Talc"ous(?), } a. [Cf. F. talqueux.] (Min.) Of or pertaining to talc; composed of, or resembling, talc.
Tal"cum(?), n. [NL.] (Min.) Same as Talc.
[Webster 1913 Suppl.]
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Mon 10th December 2018