Cotyledon
Cotyledon
Cotyledon (/kɒtɪˈliːdən/; from the Greek word kotyledon meaning "cup-shaped cavity") is a significant term in the field of Botany and Embryology.
Etymology
The term "Cotyledon" is derived from the Greek word kotyledon which means a "cup-shaped cavity". The word was first used in the 16th century to describe the first leaves of a germinating seed.
Definition
In Botany, a Cotyledon is an essential part of the embryo within the seed of a plant. Often when the seed germinates, or begins to grow, the Cotyledon may become the embryonic first leaves of a seedling.
In Embryology, Cotyledon refers to a part of the mammalian placenta.
Types of Cotyledon
There are two types of cotyledons:
1. Monocotyledons: These are species of plants that have one cotyledon in the seed. Examples include corn, wheat, and rice.
2. Dicotyledons: These are species of plants that have two cotyledons in the seed. Examples include beans, lentils, and peas.
Related Terms
- Embryo: An organism in the early stages of growth and differentiation, from fertilization to the beginning of the third month of pregnancy in humans. In plants, it is the part of the seed that develops into a new plant.
- Seed: A mature fertilized plant ovule, consisting of an embryo and its food source and having a protective coat.
- Germination: The process by which a plant grows from a seed.
- Placenta: An organ that develops in the uterus during pregnancy that provides oxygen and nutrients to the growing baby.
External links
- Medical encyclopedia article on Cotyledon
- Wikipedia's article - Cotyledon
This WikiMD dictionary article is a stub. You can help make it a full article.
Languages: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
Urdu,
বাংলা,
తెలుగు,
தமிழ்,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
European
español,
Deutsch,
français,
русский,
português do Brasil,
Italian,
polski