Peperine
Pronunciation : Pep"e*rine, Pep`e*ri"no
Part of Speech : n.
Etymology : [It. peperino, L. piper pepper. So called on account of its color.] (Geol.)
Definition : Defn: A volcanic rock, formed by the cementing together of sand, scoria, cinders, etc.
Source : Webster's Unabridged Dictionary, 1913