1 entry 1 source
Fergusonite
Open directlyWebster's 1828 Dictionary · 1828
Part of speech: noun (n.)
A mineral of a brownish black color, essentially a tantalo- niobate of yttrium, erbium, and cerium; -- so called after Robert Ferguson.
1 entry 1 source
Part of speech: noun (n.)
A mineral of a brownish black color, essentially a tantalo- niobate of yttrium, erbium, and cerium; -- so called after Robert Ferguson.