# impsonite

> English word · Noun

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

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

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/impsonite