abyssolith (plural abyssoliths)
- (geology) A mass of igneous rock deep in the crust with no known bottom; a large batholith.
'1920, Amadeus William Grabau, A Textbook of Geology: General Geology:
- An abyssolith, then, is a mass of rock, generally granite or one of the more basic rocks of this type...
- Philip Babcock Gove (editor), Webster's Third International Dictionary of the English Language, Unabridged (G. & C. Merriam Co., 1976 , ↑ISBN), page 9