Definition

1. Noun:
   • Aril: A specialized botanical term referring to an extra seed-covering, often fleshy and brightly colored, that grows from the point of attachment of the seed to the ovary wall. It is a characteristic feature of certain plant seeds, such as those of the lychee or nutmeg.

Usage Examples

• Noun:
  • Hạt của cây nhục đậu khấu được bao bọc bởi một áo hạt màu đỏ rất đẹp. (The seed of the nutmeg tree is covered by a very beautiful red aril.)
  • Áo hạt của quả vải thường bị nhầm lẫn với phần thịt quả. (The aril of the lychee fruit is often mistaken for the fruit pulp.)

Advanced Usage

• This term is almost exclusively used in scientific, botanical, or academic contexts when describing plant morphology and seed anatomy.

Variants and Related Words

• Vỏ hạt: Seed coat or testa, which is the standard protective outer layer of a seed, distinct from an aril.
• Túi noãn: Ovule, the structure that develops into a seed after fertilization.

Synonyms

• Arillus: The Latin-derived synonym used in technical botanical nomenclature.
• Seed coat (in a broad, non-technical sense): However, this is not precise, as a true seed coat (testa) is different from an aril.

Related Terms

• Quả giả: A false fruit or accessory fruit, where other parts of the flower contribute to the fleshy structure. An aril is a part of the seed, not the fruit.
• Màng bọc hạt: A general term for any seed membrane or covering, which could include an aril.