This might refer to the dirty ring left around a bathtub when someone soaks in a bathtub with soapy bubbles then empties the water. The dirty soap clings to the the sides of the bathtub leaving a ring mark of residue where the high water level was.
What is refinery residue
A residue is something left over. Fires usually leave a residue of ash.
Salt (NaCl) is not a residue.
The oily residue was sent to the lab for examination.Go and wash that residue off your hands.
That is the correct spelling of the word "residue" (remaining, as of a spilled material).
This residue is bitumen.
Residue of The Residents was created in 1971.
There was a powdery residue left over after I evaporated the solution.
Does crack cocain leave a residue
Residue Hymns was created in 2007-10.
It's cyanoacrylate residue.
Residue is a noun. An easy way to check if a word is a noun is try putting a, the or an in front of it A residue of coffee grounds remained in the cup. The adjective form is residual. - There are still a few residual problems with the new computer program.