ngoại nhũ
Definition
- Noun (Botany):
- Perisperm: A nutritive tissue in some seeds, derived from the nucellus (maternal tissue of the ovule), which surrounds or is adjacent to the endosperm or embryo. It is a food reserve distinct from the more common endosperm.
Usage Examples
- Noun:
- Hạt của một số loài thực vật có ngoại nhũ. (The seeds of some plant species possess perisperm.)
- Ngoại nhũ là nguồn dự trữ chất dinh dưỡng quan trọng. (The perisperm is an important reserve of nutrients.)
Advanced Usage
- This term is highly specialized and used almost exclusively in academic, botanical, or biological contexts when describing seed anatomy and development.
Variants and Related Words
- Nội nhũ (n): Endosperm. The more common nutritive tissue inside seeds, formed from fertilization.
- Phôi nhũ (n): Another term for endosperm.
- Nhu mô dự trữ (n): General term for reserve/storage parenchyma in plants.
Synonyms
- Botanical synonym: Perisperm.
Related Terms (Botanical Anatomy)
- Hạt (n): Seed.
- Noãn (n): Ovule.
- Phôi (n): Embryo.
- Nội nhũ (n): Endosperm.