porphyroid
[ pawr-fuh-roid ]
/ ˈpɔr fəˌrɔɪd /
noun
a rock resembling porphyry.
a sedimentary rock that has been metamorphosed so as to leave some original crystals in a fine-textured, layered matrix.
Origin of porphyroid
First recorded in 1790–1800;
porphyr(y) +
-oid
Words nearby porphyroid
porphyritic,
porphyrization,
porphyrize,
porphyroblast,
porphyrogenite,
porphyroid,
porphyropsin,
porphyry,
porpoise,
porrect,
porridge
Example sentences from the Web for porphyroid
Pumice and trachyte are the most common rocks around this mountain, and these are augitic or porphyroid.
The Andes and the Amazon |James Orton
British Dictionary definitions for porphyroid
porphyroid
/ (ˈpɔːfɪˌrɔɪd) /
adjective
(of metamorphic rocks) having a texture characterized by large crystals set in a finer groundmass
noun
a metamorphic rock having this texture