sylvite

noun

syl·​vite ˈsil-ˌvīt 

variants or less commonly sylvine

ˈsil-ˌvēn 

: a mineral that is a natural potassium chloride and occurs in colorless cubes or crystalline masses

Word History

Etymology

alteration of sylvine, from French, from New Latin sal digestivus Sylvii digestive salt of Sylvius, from Sylvius latinized name of Jacques Dubois †1555 French physician

First Known Use

1868, in the meaning defined above