Main Entry: tes·ton

Pronunciation: \ˈtes-ˌtän\

Variant(s): or tes·toon \tes-ˈtün\

Function: noun

Etymology: Middle French, from Old Italian testone, augmentative of testa head, from Late Latin, skull — more at tester

Date: 1536

: any of several old European coins: as a : a shilling of Henry VIII of England decreasing in value to ninepence and then to sixpence in Shakespeare's time b : a French silver coin of the 16th century worth between 10 and 14¹⁄₂ sous