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1. (n.) cotyledon
the primary or rudimentary leaf of the embryo of seed plants.
Etymology: (1535–45; < L: navelwort < Gk kotylēdṒn lit., a cuplike hollow, der. of kotýlē cup)
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| Definition of 'cotyledon' |
Princeton's WordNet |
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1. (noun) cotyledon, seed leaf
embryonic leaf in seed-bearing plants
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| Definition of 'cotyledon' |
Webster Dictionary |
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1. (noun) cotyledon
one of the patches of villi found in some forms of placenta
2. (noun) cotyledon
a leaf borne by the caulicle or radicle of an embryo; a seed leaf
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| Definition of 'cotyledon' |
U.S. National Library of Medicine |
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1. cotyledon
A part of the embryo in a seed plant. The number of cotyledons is an important feature in classifying plants. In seeds without an endosperm, they store food which is used in germination. In some plants, they emerge above the soil surface and become the first photosynthetic leaves. (From Concise Dictionary of Biology, 1990)
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Definitions of cotyledon 
