nPrehnite(Min) A pale green mineral occurring in crystalline aggregates having a botryoidal or mammillary structure, and rarely in distinct crystals. It is a hydrous silicate of alumina and lime.
Century Dictionary and Cyclopedia
prehniteA mineral, usually of a pale-green color and vitreous luster, commonly occurring in botryoidal or globular forms with crystalline surface. It is a hydrous silicate of aluminium and calcium, allied to the zeolites, and is found with them in veins and geodes, most frequently in rocks of the basaltic type. Also called edelite.
Chambers's Twentieth Century Dictionary
nPrehnitepren′īt a hydrous silicate of alumina and lime, usually of a pale-green colour.
Webster's Revised Unabridged Dictionary
So called from the German Colonel Prehn, who first found it