The Collaborative International Dictionary
Peperine
Peperine \Pep"e*rine\, Peperino \Pep`e*ri"no\, n. [It. peperino, L. piper pepper. So called on account of its color.] (Geol.) A volcanic rock, formed by the cementing together of sand, scoria, cinders, etc.
Wiktionary
peperine
n. (alternative form of peperino English)