Definitions

1. noun

The remaining part of something that has been partially destroyed or removed.

“The archaeologists uncovered a significant residuum of the ancient city’s architecture.”

2. noun

The solid or liquid substance left after a chemical reaction or the process of distillation.

“The residuum of the distillation process was a clear liquid with medicinal properties.”

3. noun

The remaining part of a mathematical expression after simplifying or reducing it.

“The residuum of the equation was a simple fraction that could be easily solved.”