pitchstone
(noun) dark acid granitic glass
Source: WordNet® 3.1
pitchstone (usually uncountable, plural pitchstones)
(geology) a natural glass, rich in microscopic crystallites, formed by the rapid cooling of lava or magma
• postethnic
Source: Wiktionary
Pitch"stone`, n. (Geol.)
Definition: An igneous rock of semiglassy nature, having a luster like pitch.
Source: Webster’s Unabridged Dictionary 1913 Edition
1 October 2024
(noun) a high-crowned black cap (usually made of felt or sheepskin) worn by men in Turkey and Iran and the Caucasus
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