1. (geology) the matrix of fine-grained crystalline material in which larger crystals are embedded

Derived forms: groundmasses

Type of: igneous rock

Part of: porphyritic rock, porphyry

Encyclopedia: Groundmass

• randomness
• randy
• ranee
• range
• range animal
• range hood
• range in
• range of a function
• range of mountains
• range pole
• rangefinder
• rangeland
• ranger
• Rangifer
• Rangifer arcticus
• Rangifer caribou
• Rangifer tarandus
• ranging
• ranging pole
• Rangoon
• rangpur
• rangpur lime
• rangy
• rani
• ranid