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We found 8 dictionaries with English definitions that include the word porphyritic rock:
Click on the first link on a line below to go directly to a page where "porphyritic rock" is defined.

General (7 matching dictionaries)

1. porphyritic rock: Vocabulary.com [home, info]
2. porphyritic rock: Dictionary.com [home, info]
3. porphyritic rock: Rhymezone [home, info]
4. porphyritic rock: Free Dictionary [home, info]
5. porphyritic rock: Mnemonic Dictionary [home, info]
6. porphyritic rock: LookWAYup Translating Dictionary/Thesaurus [home, info]
7. porphyritic rock: Dictionary/thesaurus [home, info]

Computing (1 matching dictionary)

8. porphyritic rock: Encyclopedia [home, info]

(Note: See porphyritic_rocks for more definitions.)

Quick definitions from WordNet (porphyritic rock) ▸ noun:  any igneous rock with crystals embedded in a finer groundmass of minerals ▸ Also see porphyritic_rocks ▸ Words similar to porphyritic rock ▸ Usage examples for porphyritic rock ▸ Words that often appear near porphyritic rock ▸ Rhymes of porphyritic rock ▸ Invented words related to porphyritic rock