Noun
One of the patches of villi found in some forms of placenta.
A leaf borne by the caulicle or radicle of an embryo; a seed leaf.
Source: Webster's dictionaryNymphaeaceae (water lilies) have reticulate veins, a single cotyledon, adventitious roots and a monocot like vascular bundle. Source: Internet
Comparison with dicotyledons Comparison of a monocot (grass) sprouting (left) with a dicot (right), showing hypogeal development in which the cotyledon remains invisible within the seed, underground. Source: Internet
If choosing to use the resealable bag method, pot the seedling up as soon as cotyledon leaves develop, or at the latest, when the first true leaf (this will be more pointy) emerges. Source: Internet
Many coconuts, like those you find in the produce section, are harvested before they reach maturity, so the cotyledon has not had a chance to develop. Source: Internet
The visible part is the first true leaf produced from the meristem ; the cotyledon itself remains within the seed. Source: Internet
It is very common to see blends of 20–30% compost used for transplanting seedlings at cotyledon stage or later. Source: Internet