from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A fine-grained granite porphyry having a groundmass with irregular intergrowths of quartz and feldspar.
from The Century Dictionary and Cyclopedia
- n. In lithology, the ground-mass of the porphyritic rocks when this is made up either entirely or almost, entirely of a crystalline mixture of the component minerals.
German Granophyr : grano-, grano- + (Por)phyr, porphyry (from Medieval Latin porphyrium; see porphyry).(American Heritage® Dictionary of the English Language, Fourth Edition)