• (a.) Knotted; tied in a knot, as a serpent. • (a.) Knotted; tied in a knot, as a serpent.
Now'ed adjective [ French noué , past participle of nouer to knot, from Latin nodare . See Nodated .] (Her.) Knotted; tied in a knot, as a serpent. 
In heraldry, nowed means knotted or tied in a knot, and is sometimes applied to a suitable representation of a serpent.