boiler
nounfeminine/kɐɫ.dɐj.ɾɐ/medium
cal·dei·ra
Definitions
1A large metal container for heating water, especially to produce steam for heating or power.
The steam boiler broke down and needed repair.
They installed a new boiler in the basement.
Common collocations
steam boilerindustrial boilercopper boilerboiler room
2A large volcanic crater, typically formed by the collapse of the ground following a major eruption.
Yellowstone National Park sits on a massive caldera.
The island's caldera is now a lake.
Common collocations
volcanic calderacollapse calderacaldera lake
Etymology
Do latim 'caldaria' (vasilha para água quente).