nablock
English
editEtymology
edit(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)
Noun
editnablock (plural nablocks)
- (mineralogy) A rounded mass, as of flint in chalk, or of ironstone in coal.
References
edit- United States Bureau of Mines, Dictionary of Mining, Mineral, and Related Terms (1996).)