[talk] 
noun, verb, talcked or talced [talkt] , talck⋅ing or talc⋅ing [tal-king] .| 1. | Also, tal⋅cum [tal-kuh m] . a green-to-gray, soft mineral, hydrous magnesium silicate, Mg3(Si4O10)(OH)2, unctuous to the touch, and occurring usually in foliated or compact masses, used in making lubricants, talcum powder, electrical insulation, etc. |
| 2. | talcum powder. |
| 3. | to treat or rub with talc. |
| tal·cum (tāl'kəm) n.
[Medieval Latin; see talc.] |
talc (tālk)
n.
A fine-grained white, greenish, or gray mineral, having a soft soapy feel and used in talcum and face powder. Also called talcum.
talcum tal·cum (tāl'kəm)
n.
See talc.