Main Entry: cal·de·ra

Pronunciation: \kal-ˈder-ə, kȯl-, -ˈdir-\

Function: noun

Etymology: Spanish, literally, caldron, from Late Latin caldaria — more at cauldron

Date: 1691

: a volcanic crater that has a diameter many times that of the vent and is formed by collapse of the central part of a volcano or by explosions of extraordinary violence