the.com/residue
What's left when the interesting part of the reaction already happened.
means The material that remains after something has evaporated, been removed, or done its main work — the leftover trace of a process.
from From Latin residuum, 'that which remains,' rooted in residere — 're-' (back) plus 'sidere' (to settle), the same sitting-down verb that gives us 'reside' and 'sediment.' A residue is etymologically whatever stays seated after everything else has gotten up and left.
- math sense
- measures how a function misbehaves around a singularity
- chemistry sense
- the leftover gunk after you wanted something else
- etymology
- from Latin residuum, literally the sitting-behind part
- protein biology
- each amino acid link in a chain gets this name