Definitions

1. noun

The remaining part of a substance or body after some other part has been removed.

“The geologist analyzed the residuum of the ancient volcano to understand its formation process.”

2. noun

The amount of a substance remaining in a system after a reaction or other process.

“The chemical engineer calculated the residuum of the reaction to determine its efficiency.”

3. noun

A remainder or leftover, especially one that is unwanted.

“The company struggled to dispose of the residuum of the abandoned factory.”