Added to supply what is wanted; additional; being, or serving as, a supplement; as, a supplemental law; a supplementary sheet or volume. ... <physiology> Supplemental air, a bill filed in aid of an original bill to supply some deffect in the latter, or to set forth new facts which can not be done by amendment. ... <mathematics> Suppleme... Found on http://www.encyclo.co.uk/local/20973