Eaglestone

//ˈiːɡl̩stəʊn// noun

Definitions

Noun
  1. 1
    A concretionary nodule of iron oxide with a loose kernel inside such that it makes a rattling noise, formerly used for magical or medicinal purposes.

    "There was the eagle-stone (aetites) which the Countess of Newcastle was invited to wear in 1633 to ease her labour pains […]."

Etymology

From eagle + stone, because it was said to be found in eagles' nests.

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