Definition

1. Noun:
   • Slaked lime / Hydrated lime: A fine, white, dry powder produced by adding water to quicklime (calcium oxide). It is chemically calcium hydroxide, used in construction, agriculture, and traditional preparations.

Usage Examples

• Noun:
  • Người thợ xây trộn vôi chín với cát và nước để tạo vữa. (The mason mixes slaked lime with sand and water to make mortar.)
  • Vôi chín được dùng để cải tạo đất chua. (Slaked lime is used to improve acidic soil.)

Advanced Usage

• In traditional contexts, "vôi chín" is a key ingredient in making "trầu cau" (betel quid).
  • Miếng trầu có pha thêm một ít vôi chín. (The betel quid includes a little slaked lime.)

Variants and Related Words

• Vôi sống (n): Quicklime / Calcium oxide. The unhydrated, reactive form before water is added.
  • Vôi sống tỏa nhiệt rất mạnh khi gặp nước. (Quicklime releases intense heat when it meets water.)

Synonyms

• Hydrated lime: The technical term for the chemical compound.
• Calcium hydroxide: The scientific name for the substance.

Notes on Usage

• "Vôi chín" is a compound noun specific to Vietnamese. In English, it is translated as a technical or industrial material ("slaked lime"). It is not typically used in everyday English conversation outside specific technical, construction, or agricultural contexts.