ignimbrite

noun ig·nim·brite \ˈig-nəm-ˌbrīt\

Definition of IGNIMBRITE

: a hard rock formed by solidification of chiefly fine deposits of volcanic ash

German Ignimbrit, from Latin ignis + imbr- (from imber rain) + German -it ¹-ite — more at imbricate

First Known Use: 1932

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