Term: cotyledon, monocotyledon (plural usually monocots), dicotyledons(plural usually dicots)
Origin: Anc Greek
>κοτύλη/cotyle(=small, hollow cup) + είδος/eidos(=form, type)
literally meaning “cup shaped cavity”
(botan). The distinction between the dicotyledons and monocotyledons was recognized by ancient Greek philosopher Theophrastus, ( 300 BCE), and later during the Renaissance by German philosopher Albertus Magnus (1200-1280 A.D.). The term cotyledon was coined by Italian doctor Marcello Malpighi (1628 –1694) and finally John Ray (1628-1705), in his natural system of classification, formally recognized two major subdivisions of flowering plants: the dicotyledons or dicots and the monocotyledons or monocots.
1. Cotyledon is the first leaf (monocotyledons or monocots) or first two leaves (dicotyledons or dicots) developed by the embryo of a seed from flowering plants.
2. one of the visible segments on the maternal surface of the placenta.