- the metallic mass that forms beneath the slag at the bottom of the crucible or furnace in smelting ores.
- an impure intermediate product obtained in smelting ores.
Origin of regulus
Words nearby regulus
Other definitions for regulus (2 of 2)
How to use regulus in a sentence
Mr. Regulus thought with Dr. Harlowe, that it was a pity I was not at school.
"It must not be thought of at present," she answered, speaking to Mr. Regulus.
"I think I can intercede with Mr. Regulus to release you," said Mrs. Linwood.
At his heart is a gorgeous star of first magnitude, α or Regulus.Astronomy for Amateurs|Camille Flammarion
The residuum consists of revived mercury, with some regulus and calx of antimony.