Main Entry: am·phi·bole

Pronunciation: \ˈam(p)-fə-ˌbōl\

Function: noun

Etymology: French, from Late Latin amphibolus, from Greek amphibolos ambiguous, from amphiballein to throw round, doubt, from amphi- + ballein to throw — more at devil

Date: circa 1823

1 : hornblende
2 : any of a group of complex silicate minerals with like crystal structures that contain calcium, sodium, magnesium, aluminum, or iron ions or a combination of them