Definitions

1. noun

A furnace, especially one used for smelting, in which the fuel is burned beneath the charge.

“The calder was used to smelt the iron for the blacksmith’s forge.”

2. noun

A type of volcanic landform, typically a depression in the earth’s surface with steep sides, formed by collapse of a volcanic vent or a caldera.

“The calder was formed after the eruption of the volcano, creating a large lake in its center.”

3. noun

An ancient iron furnace, especially one in a Roman villa.

“The archaeologists discovered a calder in the ruins of the Roman villa.”