An example of a cotyledon is the first two leaves that sprout from a sunflower seed.
Origin of cotyledonModern Latin ; from L, name of a plant ; from Classical Greek kotyl?d?n ; from kotyl?, a hollow, cavity
- Botany A leaf of the embryo of a seed plant, which upon germination either remains in the seed or emerges, enlarges, and becomes green. Also called seed leaf.
- Anatomy One of the lobules constituting the uterine side of the mammalian placenta, consisting mainly of a rounded mass of villi.
Origin of cotyledonLatin cotyl&emacron;d&omacron;n, navelwort, from Greek kotul&emacron;d&omacron;n, from kotul&emacron;, hollow object.
- cot′y·le′don·ar′y , cot′y·le′don·al , cot′y·le′do·nous
bean seed germinating
From Latin cotyledon, from Ancient Greek κοτυληδών (kotulēdōn, “cup-shaped cavity”), from κοτύλη (kotulē, “cup”).