abyssolith

English

Etymology

From abyss (“deep”) +‎ -lith (“stone”).

Pronunciation

• (US) IPA^(key): /əˈbɪs.ə.lɪθ/

Noun

abyssolith (plural abyssoliths)

1. (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...

References

• Philip Babcock Gove (editor), Webster's Third International Dictionary of the English Language, Unabridged (G. & C. Merriam Co., 1976 [1909], →ISBN), page 9