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cottonseed
cottonseed cake
cottontail
cottonwood
cottony
cottony-cushion scale
COTW
-cotyl
cotyledon
cotylosaur
cou-cou
couch (1)
couch (2)
couch grass
couch potato
couchant
couchette
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cotyledon

cot·y·le·don [ kòtt'l d'n ] (plural cot·y·le·dons)


noun 
Definition:
 
1. first leaf: the first leaf, or one of the first pair of leaves, produced by the seed of a flowering plant. They may serve as food stores, remaining in the seed at germination, or produce food by photosynthesis.

2. tuft on mammalian placenta: a tuft of projections villi on the placenta of a mammal

[Mid-16th century. Via Latin, "navelwort" < Greek kotulēdōn "cup-shaped cavity" < kotulē "cup"]

cot·y·le·don·al adjective
cot·y·le·don·ar·y adjective
cot·y·le·don·ous adjective
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