Hypersthene

[haipә:sθi:n]

Definition

(n.) An orthorhombic mineral of the pyroxene group, of a grayish or greenish black color, often with a peculiar bronzelike luster (schiller) on the cleavage surface.

Inputed by Jeff

Definition

n. a rock-forming mineral which crystallises in orthorhombic forms an anhydrous magnesian silicate generally dark green or raven-black in colour.—adj. Hypersthē′nic.—n. Hypersthē′nite a more or less coarsely crystalline igneous rock allied to gabbro—an aggregate of labradorite (feldspar) and hypersthene of plutonic origin.

Checker: Spenser