mandlestone
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Mandlestone — Man dle*stone , n. [G. mandelstein almond stone.] (Min.) Amygdaloid. [1913 Webster] … The Collaborative International Dictionary of English
amygdaloid — 1. adjective Shaped like an almond. 2. noun A variety of trap or basaltic rock, containing small cavities, occupied, wholly or in part, by nodules or geodes of different minerals, especially agates, quartz, calcite, and the zeolites. When the… … Wiktionary