from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A light-colored volcanic rock composed largely of feldspars.

from The Century Dictionary.

  • noun The name given by Klaproth to certain volcanic rocks of exceedingly variable and complex character, but closely related to the trachytes.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Min.) A compact, feldspathic, igneous rock containing nephelite, haüynite, etc. Thin slabs give a ringing sound when struck; -- called also clinkstone.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun mineralogy a light-coloured rock of volcanic origin composed mostly of alkali feldspars


Sorry, no etymologies found.



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