Definitions

from The Century Dictionary and Cyclopedia

  • n. In petrography, a name given by H.S. Washington (1897), to porphyritic lavas characterized by phenocrysts of augite, olivin, and sometimes feldspars, the ground-mass consisting of feldspar with augite and magnetite.

Etymologies

Sorry, no etymologies found.

Examples

Sorry, no example sentences found.

Wordnik is becoming a not-for-profit! Read our announcement here.

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.