What does "allegheny" mean?
Allegheny: [From the Allegheny River, Pennsylvania.] (Geol.) Pertaining to or designating a subdivision of the Pennsylvanian coal measure.
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00