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cotyledon

XDict

n. 子叶,瓦松属

PyDict

子叶,瓦松属

WordNet (r) 3.0 (2006) (WordNet)

cotyledon
n 1: embryonic leaf in seed-bearing plants [synonym: {cotyledon},
{seed leaf}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Cotyledon \Cot`y*le"don\ (k?t`?-l?"d?n), n. [Gr.??? a cupshaped
hollow, fr. ???. See {Cotyle}.]
1. (Anat.) One of the patches of villi found in some forms of
placenta.
[1913 Webster]

2. (Bot.) A leaf borne by the caulicle or radicle of an
embryo; a seed leaf.
[1913 Webster]

Note: Many plants, as the bean and the maple, have two
cotyledons, the grasses only one, and pines have
several. In one African plant ({Welwitschia}) the
cotyledons are permanent and grow to immense
proportions.
[1913 Webster]

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英文字典中文字典相关资料:

Cotyledon - Wikipedia
The cotyledon of grasses and many other monocotyledons is a highly modified leaf composed of a scutellum and a coleoptile The scutellum is a tissue within the seed that is specialized to absorb stored food from the adjacent endosperm
Cotyledon | Definition, Description, Function, Examples, Facts . . .
Cotyledon, seed leaf within the embryo of a seed Cotyledons help supply the nutrition an embryo needs to germinate and become established as a photosynthetic seedling and may themselves be a source of nutritional reserves or may aid the embryo in metabolizing nutrition stored elsewhere in the seed
COTYLEDON Definition Meaning - Merriam-Webster
The meaning of COTYLEDON is the first leaf or one of the first pair or whorl of leaves developed by the embryo of a seed plant
Cotyledons: What they are, how to identify them, and how to care for . . .
Cotyledons are essential embryonic structures found in the seeds of flowering plants (angiosperms) and other higher plants They are commonly known as "seed leaves" because they are the first green structures to emerge when a seed germinates
Cotyledon Succulents: 25 Varieties You Need to See to Believe
Get this – there’s a whole group of funky plants called Cotyledon succulents that will make you do a double take! With their wild shapes, vibrant colors and out-of-this-world patterns, these South African natives are like little green aliens landed straight from another planet
Cotyledon (genus) - Wikipedia
Cotyledon is one of some 35 genera of succulent plants in the family Crassulaceae Mostly from Southern Africa, they also occur throughout the drier parts of Africa as far north as the Arabian Peninsula
Understanding Cotyledons and Their Role in Plant Growth | Gardening . . .
Cotyledons may be one of the first visible signs a plant has germinated, but what is a cotyledon? It is the embryonic part of a seed which stores fuel for further growth
The Significance of Cotyledons in Plant Development
Cotyledons, also known as seed leaves, are the first leaves to emerge from a germinating seed They are part of the embryo within the seed and can be found in the embryonic axis Cotyledons can vary in shape, size, and number depending on the plant species
Cotyledon | Definition, Function Types - Lesson | Study. com
What is the simple definition of cotyledon? A cotyledon is the first leaf of a developing plant embryo This is the first part of the plant to emerge from the seed after germination
Cotylédon — Wikipédia
Le cotylédon (scientifiquement nommé feuille cotylédonaire) est une feuille primordiale constitutive de la graine C'est une partie importante de l'embryon contenu dans la graine d'une plante Le nombre de cotylédons présents est une caractéristique utilisée par les botanistes pour classer les plantes à fleurs (angiospermes)

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