• Webster's Revised Unabridged Dictionary
    • n Botryolite (Min) A variety of datolite, usually having a botryoidal structure.
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Century Dictionary and Cyclopedia
    • n botryolite A variety of datolite or borosilicate of calcium, occurring in mammillary or botryoidal concretions, in a bed of magnetic iron in gneiss, near Arendal in Norway, and elsewhere. Its colors are pearl-gray, grayish- or reddish-white, and pale rose-red. It is said to differ from datolite in containing more water.
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Webster's Revised Unabridged Dictionary
Gr. , cluster of grapes + -lite,