n. A hard, red clay used by Native Americans for making tobacco pipes
the GNU version of the Collaborative International Dictionary of English
n. A kind of clay slate, carved by the Indians into tobacco pipes. Cf. catlinite.
The Century Dictionary and Cyclopedia
n. Same as catlinite.
n. The cast-iron prism lying on the back-stone of a lead-ore hearth and containing an opening for the twyer.
Word Usage
"Between here and the James river is the area where the Natives of all the nations in the West 'mined' the pipestone Catlinite or "pipestone", a form of red talc."