madstone

English

Etymology

From mad +‎ stone.

Pronunciation

• (UK) IPA^(key): /ˈmadstəʊn/

Noun

madstone (plural madstones)

1. (US) A stone believed to have the power to heal the bite of a rabid or venomous animal. [from 19th c.]
   • 2013, Philipp Meyer, The Son, Simon & Schuster, published 2014, page 332:

     I gathered my things and asked the Negroes to return the scalps they'd stolen, along with my madstone.