cotyledon

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Related to Cotyledons: angiosperm, Monocotyledons, Dicotyledons
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cotyledon
bean seed germinating

cot·y·le·don

 (kŏt′l-ēd′n)
n.
1. 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.
2. Anatomy One of the lobules constituting the uterine side of the mammalian placenta, consisting mainly of a rounded mass of villi.

[Latin cotylēdōn, navelwort, from Greek kotulēdōn, from kotulē, hollow object.]

cot′y·le′don·ar′y (-ēd′n-ĕr′ē), cot′y·le′don·al (-ēd′n-əl), cot′y·le′do·nous (-ēd′n-əs) adj.

cotyledon

(ˌkɒtɪˈliːdən)
n
1. (Botany) a simple embryonic leaf in seed-bearing plants, which, in some species, forms the first green leaf after germination
2. (Zoology) a tuft of villi on the mammalian placenta
[C16: from Latin: a plant, navelwort, from Greek kotulēdōn, from kotulē cup, hollow]
ˌcotyˈledonal adj
ˌcotyˈledonary adj
ˌcotyˈledonous, ˌcotyˈledoˌnoid adj

cot•y•le•don

(ˌkɒt lˈid n)

n.
the primary or rudimentary leaf of the embryo of seed plants.
[1535–45; < Latin: navelwort < Greek kotylēdṓn literally, a cuplike hollow, derivative of kotýlē cup]
cot`y•le′don•al, cot`y•le′don•ar`y (-ˌɛr i) cot`y•le′don•ous, adj.

cot·y·le·don

(kŏt′l-ēd′n)
A leaf of the embryo of a seed-bearing plant. Most cotyledons emerge, enlarge, and become green after the seed has germinated. Cotyledons either store food for the growing embryo or absorb food that has been stored in the endosperm for eventual distribution to the growing parts of the embryo. Also called seed leaf. See more at dicotyledon, monocotyledon.

cotyledon

A seed leaf that provides food for an embryo plant.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cotyledon - embryonic leaf in seed-bearing plantscotyledon - embryonic leaf in seed-bearing plants
cataphyll - a reduced or scarcely developed leaf at the start of a plant's life (i.e., cotyledons) or in the early stages of leaf development
Translations

cotyledon

[ˌkɒtɪˈliːdən] Ncotiledón m

cotyledon

nKeimblatt nt

cotyledon

[ˌkɒtɪˈliːdn] n (Bot) → cotiledone m
References in classic literature ?
These historians resemble a botanist who, having noticed that some plants grow from seeds producing two cotyledons, should insist that all that grows does so by sprouting into two leaves, and that the palm, the mushroom, and even the oak, which blossom into full growth and no longer resemble two leaves, are deviations from the theory.
It can be shown that plants most widely different in habit and general appearance, and having strongly marked differences in every part of the flower, even in the pollen, in the fruit, and in the cotyledons, can be crossed.
Fruit a loculicidal capsule, indehiscent pod, or drupe; seeds with variable testa cells; embryo with 2 cotyledons.
The number of dead and alive mites for each treatment was reported 48 hours after contact with the treated cotyledons, except for spiromesifen in which the number of alive and dead mites was counted after 96 hours after mite release because it was noticed from the preliminary studies that adult females treated with spiromesifen usually die 96 hours after applying the acaricide.
1995, "Endogenous ethylene requirement for adventitious root induction and growth in tomato cotyledons and lavandin microcuttings in vitro," Plant Growth Regul.
During the initial stages of collar formation, meristems in the axils of the two cotyledons develop into buds and develop with a direct connection to the vascular cylinder.
Senna reticulata has an epigean germination mode, with foliaceous cotyledons (Hladik & Miquel, 1990).
tannins) in the cotyledons or the husk surrounding the nut discourage some nut predators.
The polyphenols (10-20% dry bean weight) are stored in the pigment cells or polyphenolic cells of the cotyledons together with the alkaloids caffeine, theobromine and theophylline [6].
Properties of Phenylalanine Ammonia-Lyase from Marrow Cotyledons.
Cowpeas and other large-seeded cotyledons are huge in comparison; they not only can germinate well if planted deeper, they do far better if planted deeper.
When cut transversely they show a narrow, brown outer area and two large dense white and oily cotyledons.