Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

groundmass

play
noun ground·mass \ˈgrau̇n(d)-ˌmas\

Definition of groundmass

  1. :  the fine-grained or glassy base of a porphyry in which the larger distinct crystals are embedded



1879

First Known Use of groundmass

1879


Learn More about groundmass


Seen and Heard

What made you want to look up groundmass? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to make consistent or congruous

Get Word of the Day daily email!