/ Dictionary / Index T talc: Meaning and Definition of Find definitions for: talc Pronunciation: (talk), [key] — n., v., talcked talced talck•ing talc•ing —n. a green-to-gray, soft mineral, hydrous magnesium silicate, Mg(SiO)(OH), unctuous to the touch, and occurring usually in foliated or compact masses, used in making lubricants, talcum powder, electrical insulation, etc. See —v.t. to treat or rub with talc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: talc (Thesaurus) Talbotype Talca Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language