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Look up cotyledon in Wiktionary, the free dictionary.
A cotyledon is a significant part of the embryo within the seed of a plant.
Cotyledon may also refer to:
- Cotyledon (genus), a plant genus in the family Crassulaceae
- Cotyledon (placenta), a part of the anatomy of mammals
- Saxifraga cotyledon, a species of saxifrage, a plant