quartz porphyry

noun

: a porphyritic extrusive or dike rock in which quartz with more or less corroded crystals and orthoclase and usually mica, amphibole, or pyroxene occur as phenocrysts in a groundmass that is felsophyric, granophyric, or vitrophyric

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Dictionary Entries Near quartz porphyry

Cite this Entry

“Quartz porphyry.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quartz%20porphyry. Accessed 25 Nov. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!