(eu-hed´-ral) Said of a mineral grain that is completely bounded by its own rational faces, and whose growth has not been restrained or interfered with by adjacent grains.

Possessing well-developed crystal form and faces.

Euhedral refers to well-formed crystals with sharp, easily-recognized faces. Normally, crystals do not form smooth faces or sharp crystal outlines. Many crystals grow from cooling liquid magma.