toadstone

[ tohd-stohn ]
/ ˈtoʊdˌstoʊn /

noun

any of various stones or stonelike objects, formerly supposed to have been formed in the head or body of a toad, worn as jewels or amulets.

Origin of toadstone

First recorded in 1550–60; toad + stone
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British Dictionary definitions for toadstone

toadstone

/ (ˈtəʊdˌstəʊn) /

noun

rare an amygdaloidal basalt occurring in the limestone regions of Derbyshire

Word Origin for toadstone

C18: perhaps from a supposed resemblance to a toad's spotted skin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012