Definition of polyphant in English:

polyphant

noun

  • In full "polyphant stone". A kind of Cornish potstone, greenish-grey in colour.

Origin

Mid 19th century; earliest use found in Scientific American. From Polyphant (formerly Pollaphant), the name of a village in Cornwall, England, between Bodmin and Launceston, where the main quarry is located.

Pronunciation

polyphant

/ˈpɒlɪf(ə)nt/