Definition

1. Noun:
   • Pumice stone: A light, porous volcanic rock used, especially when in a small piece, for rubbing against the skin to clean or smooth it, often during bathing.

Usage Examples

• Noun:
  • Cô ấy dùng một viên đá kì để tẩy da chết. (She uses a pumice stone to exfoliate dead skin.)
  • Đá kì thường được tìm thấy trong phòng tắm. (Pumice stones are often found in bathrooms.)

Advanced Usage

• The term is specific and refers primarily to the personal care object. It is not typically used in broader geological contexts.

Variants and Related Words

• Đá bọt (n): pumice (the general geological material).
  • Đá bọt rất nhẹ và có nhiều lỗ. (Pumice is very light and has many holes.)

Synonyms

• Pumice stone
• Lava stone (in the context of skin care)
• Exfoliating stone

Notes on Usage

• "Đá kì" is a compound noun. The core meaning is fixed and refers specifically to the grooming tool.
• It is considered a standard term, though "đá bọt" may also be used colloquially for the same object.