recrement

n.
Waste matter; dross.

[Latin recrēmentum : re-, re- + cernere, crē-, to separate.]

recremental rec're·men'tal (-mĕn'tl) adj.

Saliva, or other secretion, that is reabsorbed into the blood.

1) the superfluous or useless portion of any substance; refuse, dross, scum, off-scouring
2) spec. a waste product or excretion of an animal or vegetable body; also Physiol., a fluid which is separated from the blood and again absorbed into it, as the saliva or bile (opp. to excrement)