noun Download 🔗Share Each of the patches of vili on the foetal chorion in the placenta of ruminants and some other mammals. Examples : "The veterinarian pointed to the image of the cow's placenta and explained that each cotyledon helps provide nutrients from the mother to the developing calf. " organism animal anatomy physiology biology Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share The leaf of the embryo of a seed-bearing plant; after germination it becomes the first leaves of the seedling. Examples : "The young bean sprout pushed through the soil, revealing its two cotyledons, small leaves that provided initial nourishment before true leaves developed. " plant biology seed nature agriculture Chat with AIVocabulary GamePractice Reading