What does "impsonite" mean?

A black carbonaceous substance, believed to be derived from a fluid bitumen which polymerized after filling a vein.

What is a synonym for "impsonite"?

Common synonyms include: arkosite.

noun

noun ·Rare ·Advanced level

Noun

1
A black carbonaceous substance, believed to be derived from a fluid bitumen which polymerized after filling a vein. countable, uncountable

From Impson + -ite, after a sample from the Impson Valley (later reclassified as grahamite); coined by George Homans Eldridge in 1901.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.