afterglow
afterimage
balance
butt
butt end
candle ends
chaff
debris
detritus
dregs
end
excess
fag end
filings
fossil
heel
holdover
husks
leavings
leftover
leftovers
odds and ends
offscourings
orts
parings
rags
refuse
relics
remainder
remains
remnant
residual
residuum
rest
roach
rubbish
ruins
rump
sawdust
scourings
scraps
shadow
group
moiety
radical
acid
ash
chemical
compound
constituent
contamination
deposit
dust
débris
fluid
fume
grease
mixture
moisture
molecule
odor
particle
salt
stain
substance
trace
vapor