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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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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中文 (简体)翻译：剑桥词典 - Cambridge Dictionary
The seeds contained high contents of starch (74 3% of the total 1 57 g mean dry weight of the cotyledon) and lipid (15 0%)
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 - an overview | ScienceDirect Topics
Cotyledon species are generally shrubby and much-branched, with often quite large leaves arranged at intervals along sturdy or weak stems and branches Flowers are usually quite showy, very large, and aloe-like with variously reflexed corolla lobes (Figs 3 8–3 11)
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
What Is a Cotyledon? The First Leaf of a Plant - Biology Insights
A cotyledon, often called a seed leaf, is the first leaf-like structure formed within the embryo of a seed This structure is a fundamental part of the developing plant and is present before the seed begins to sprout
Cotyledon - ScienceDaily
A cotyledon is a significant part of the embryo within the seed of a plant Upon germination, the cotyledon usually becomes the embryonic first leaves of a seedling
Cotyledon - Biology Simple
In botany, a cotyledon is defined as the embryonic leaf within the seed of a plant It is responsible for providing essential nutrients and energy to the developing plant until it can begin producing its own food through photosynthesis
Cotyledon - bsbi. org
The cotyledons are a key distinction separating two subdivisions of plants which you will find in most wildflower guides - monocots have a single cotyledon in the seed and dicots have two The majority of our wildflowers are dicots, while species such as lilies, orchids and grasses are monocots
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 How to use cotyledon in a sentence

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