Glau″co‐phane (?), n. [Gr. γλαυκόσ silvery, gray + φαίνεσθαι to appear.] (Min.) A mineral of a dark bluish color, related to amphibole. It is characteristic of certain crystalline rocks.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.