COTYLEDONS
Noun
cotyledons
plural of cotyledon
Source: Wiktionary
COTYLEDON
Cot`y*le"don (kt`-l"dn), n. Etym: [Gr.Cotyle.]
1. (Anat.)
Definition: One of the patches of villi found in some forms of placenta.
2. (Bot.)
Definition: A leaf borne by the caulicle or radicle of an embryo; a seed
leaf.
Note: Many plants, as the bean and the maple, have two cotyledons,
the grasses only one, and pines have several. In one African plant
(Welwitschia) the cotyledons are permanent and grow to immense
proportions.
Source: Webster’s Unabridged Dictionary 1913 Edition