1) Talc 2) Talcum 1) Talc 
• (n.) A soft, compact variety of talc,, being an altered pyroxene. It is often worked in a lathe into inkstands and other articles.
Rens'se·laer·ite noun (Min.) A soft, compact variety of talc,, being an altered pyroxene. It is often worked in a lathe into inkstands and other articles. 
[n] - a kind of soft talc
noun a kind of soft talc; sometimes used as wood filler