Definitions for groundmass

• Definition
• Anagrams (712)

groundmass ground·mass

Spelling: [ground-mas]

IPA: /ˈgraʊndˌmæs/

Groundmass is a 10 letter English word. It's valid Words with friends word worth 18 points.

You can make 712 anagrams from letters in groundmass (adgmnorssu).

Definitions for groundmass

noun

1. the crystalline, granular, or glassy base or matrix of a porphyritic or other igneous rock, in which the more prominent crystals are embedded.

Origin of groundmass

First recorded in 1875-80; ground¹ + mass

Examples for groundmass

Pyroxene, quartz and augite form the groundmass, as seen in section.

In a basal flow in Moraine Park, the slaggy and compact phases show differences in phenocrysts as well as in groundmass.

These lavas have groundmass textures that vary from almost holo-crystalline to glassy.