cotyledon

(redirected from Cotyledons)
Also found in: Thesaurus, Medical, Encyclopedia.
Related to Cotyledons: angiosperm, Monocotyledons, Dicotyledons
click for a larger image
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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

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.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

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.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

cotyledon

A seed leaf that provides food for an embryo plant.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations

cotyledon

[ˌkɒtɪˈliːdən] Ncotiledón m
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

cotyledon

nKeimblatt nt
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

cotyledon

[ˌkɒtɪˈliːdn] n (Bot) → cotiledone m
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
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.
Then, the cotyledons were separated from the seeds and used as starting material.
The hypocotyl is the part of the plant embryo or seedling that lies between the radicle and the cotyledons. Upon germination, the hypocotyl pushes the cotyledons above the ground to develop.
(Called cotyledons, seed leaves sprout before the first true leaves.
urticae were confined under a clip cage, but infestation was initiated on the first true leaves rather than cotyledons. Clip cages were removed after 48 h but treatment (d 0) was delayed to 14 d post-infestation, rather than 7 d.
[4] Maternal surface is divided into cotyledons with irregular grooves in between.
However, in most cases, regeneration from adult material has limited practical applications, and most Pinus micropropagation protocols reported in the literature are based on organogenesis from the cotyledons of seeds germinated in vitro (ALONSO et al., 2006; ALVAREZ; MAJADA; ORDAS, 2009; HUMANEZ et al., 2011; STOJICIC et al., 2012).
In this study, the explants were the leaf sections without veins and cotyledons, which were collected from fruits of adult plants (1-2 m high) of A.
The plantlet growth occurred in the Petri dishes, whose upper filter paper has been removed at the third day after the germination beginning to allow the cotyledons photosynthesis.
Cotyledonary nodes excised from 5-d-old sterilized cucumber seedlings without fully expanded cotyledons were used as explants for pre-cultivation, according to the techniques described by Li et al.