thạch thán

Definition

1. Noun:
   • Coal: A hard, black or dark-brown sedimentary rock that is primarily composed of carbon, used as a fossil fuel for burning to produce heat or power.

Usage Examples

• Noun:
  • Người công nhân khai thác thạch thán từ mỏ sâu. (The worker extracts coal from the deep mine.)
  • Lò hơi này đốt bằng thạch thán. (This steam boiler is fired by coal.)

Advanced Usage

• This term is considered archaic in modern Vietnamese. The contemporary and common word for coal is "than đá".

Variants and Related Words

• Than đá (n): The modern and standard term for coal.
  • Than đá là một nguồn năng lượng không tái tạo. (Coal is a non-renewable energy source.)

Synonyms

• Coal: The primary and direct synonym.
• Black coal: A descriptive synonym emphasizing its color.

Notes on Usage

• The word "thạch thán" is rarely used in everyday language today. You will almost exclusively encounter it in historical texts, classical literature, or very formal/technical archival contexts. For all practical purposes, use "than đá".