noun
- plural form of residuum; things that remain after other parts have been removed or used
Usage: formal; technical
Examples
- The laboratory analysis identified several chemical residua in the sample.
- After the distillation process, the residua were collected for further study.
- The archaeologists found residua of ancient pottery at the excavation site.
- Industrial residua must be disposed of according to environmental regulations.
- The filtration system removed most contaminants, leaving only trace residua.
- Scientists examined the residua to determine the original composition of the mixture.