massive : Idioms & Phrases
Massive rock
(Geol.) , a compact crystalline rock not distinctly schistone, as granite; also, with some authors, an eruptive rock.
Webster 1913
weakly interacting massive particle
-
noun a hypothetical subatomic particle of large mass that interacts weakly with ordinary matter through gravitation; postulated as a constituent of the dark matter of the universe
WIMP.