Webster's Revised Unabridged Dictionary · 1913

Saturant

Saturant , adjective

[Latin saturans, p. pr. See Saturate.]

Impregnating to the full; saturating.

Saturant , noun

1.
(Chemistry) A substance used to neutralize or saturate the affinity of another substance.
2.
(Medicine) An antacid, as magnesia, used to correct acidity of the stomach.