Cŏt/y-lē'don, n.

n. [Gr. κοτυληδών, from κοτύλη. See supra.]

1. (Anat.) A cup-shaped, vascular body or lobe, as those which unite to form the placenta.
2. (Bot.) (a.) One of the seed-lobes of a plant, which involves and nourishes the embryo plant, and then perishes. (b.) A genus of plants, some of which have cup-shaped leaves; navel-wort.