Di″a‐spore (?), n. [From Gr. � a scattering; διά through, asunder + � to sow, scatter like seed: cf. F. diaspore.] (Min.) A hydrate of alumina, often occurring in white lamellar masses with brilliant pearly luster; — so named on account of its decrepitating when heated before the blowpipe.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.