caldera
Concise Oxford English Dictionary © 2008 Oxford University Press:
caldera /kɒlˈdɛːrə, -ˈdɪərə/
▶noun a large volcanic crater, especially one formed by a major eruption leading to the collapse of the mouth of the volcano.
– origin C17: from Sp., from late L. caldaria ‘boiling pot’.
'caldera' also found in these Oxford entries:
