Cotyledon

·noun One of the patches of villi found in some forms of placenta.

II. Cotyledon ·noun A leaf borne by the caulicle or radicle of an embryo; a seed leaf.

cotyledon
cŏtylēdon, ŏnis, f., = κοτυληδών, a plant, navelwort : Cotyledon umbilicus, Linn.; Plin. 25, 13, 1...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.