dầu trai

Người xưa có khi dùng dầu trai để thắp sáng.

Definition

1. Noun:
   • A type of oil: "Dầu trai" refers to a specific oil, historically identified as "huile de diptérocarpus intriqué" (oil from the Dipterocarpus intricatus tree, a species of resinous tree native to Southeast Asia). It is a plant-based oil or resin.

Usage Examples

• Noun:
  • Người xưa có khi dùng dầu trai để thắp sáng. (In the past, people sometimes used dầu trai for lighting.)
  • Dầu trai được khai thác từ một loại cây rừng. (Dầu trai is extracted from a type of forest tree.)

Advanced Usage

• This term is largely historical or botanical. In modern Vietnamese, it is not commonly used in everyday conversation. It might appear in historical texts, botanical studies, or discussions about traditional materials.

Variants and Related Words

• Dầu (n): A general term for oil, grease, or fuel (e.g., - cooking oil, - kerosene).
• Nhựa (n): Resin, sap. is a type of resinous oil.
• Dầu rái (n): Another term for a similar wood oil or resin from trees in the family, used in varnishes and traditional applications.

Synonyms

• Dầu cây (n): Tree oil (a general term).
• Nhựa dầu (n): Oleoresin.

Related Phrases

• Khai thác dầu trai: To extract .
• Cây cho dầu trai: The tree that yields .

Notes

• The reference definition "huile de diptérocarpus intriqué" is a specific French botanical identification. The Vietnamese term "dầu trai" is an old/local name for this substance.
• It is crucial not to confuse "dầu trai" with "ngọc trai" (pearl). They are completely different words and substances. "Dầu" means oil, while "ngọc" means gem/jewel.