American Dictionary of the English Language

COTYLEDON, noun [Gr., a hollow or cavity.]

1. In botany, the perishable lobe or placenta of the seeds of plants. It involves and nourishes the embryo plant, and then perishes. Some seeds have two lobes; others one only, and others none.

2. In anatomy, a little glandular body adhering to the chorion of some animals.

3. A genus of plants, navel-wort, or kidney-wort, of several species.