Definition of fingerstone in US English:

fingerstone

noun

  • 1A stone sufficiently small to be thrown by the hand.

  • 2A smooth, roughly cylindrical fossil a few inches long and tapering to a point; a belemnite. Now historical and rare.

Origin

Late Middle English; earliest use found in Mandeville's Travels. From finger + stone.

Pronunciation

fingerstone

/ˈfɪŋɡəstəʊn/