Webster's Revised Unabridged Dictionary · 1913

Graystone

Graystone , noun

(Geology) A grayish or greenish compact rock, composed of feldspar and augite, and allied to basalt.

Text from the public-domain GNU Collaborative International Dictionary of English, derived from Webster's Revised Unabridged Dictionary (1913). Definitions marked with were added by later GCIDE contributors and are not in the original 1913 edition.

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