Pyroclastic

Acceptable For Game Play - US & UK word lists

This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

The American Heritage® Dictionary of the English Language, 4th Edition
  • adj. Composed chiefly of rock fragments of volcanic origin.
    • Wiktionary, Creative Commons Attribution/Share-Alike License
  • adj. Mostly composed of rock fragments of volcanic origin
  • n. A rock mostly composed of rock fragments of volcanic origin
    • The Century Dictionary and Cyclopedia
  • Formed by volcanic agencies, or in the process of being erupted: applied to volcanic breccia or to any angular or comminuted material of igneous origin.
  • n. A pyroclastic rock.
    • Word Usage
    "The heavier particles stay close to the ground and roll downhill in what we call a pyroclastic flow."
    Same Context
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