Definition

1. Noun:
   • Diameter: A straight line passing from side to side through the center of a circle or sphere. It is also the length of this line.
   • Granulated sugar / White sugar: The common, refined sugar with medium-sized crystals, used as a staple sweetener.

Usage Examples

• Noun (Diameter):

  • Đường kính của hình tròn này là 10 cm. (The diameter of this circle is 10 cm.)
  • Hãy đo đường kính của ống nước. (Measure the diameter of the water pipe.)

• Noun (Granulated sugar):

  • Cô ấy cho hai thìa đường kính vào cà phê. (She puts two spoons of granulated sugar in her coffee.)
  • Công thức này cần 100 gram đường kính. (This recipe needs 100 grams of white sugar.)

Advanced Usage

• In geometry, "đường kính" is a fundamental measurement. The radius ("bán kính") is exactly half of the diameter.
  • Bán kính bằng một nửa đường kính. (The radius is half the diameter.)

Variants and Related Words

• Đường (n): A general term for sugar or a road/path. "Đường kính" specifies the common crystalline form.
• Đường tinh luyện (n): Refined sugar, often synonymous with "đường kính."
• Đường cát (n): Literally "sand sugar," another common term for granulated sugar.
• Bán kính (n): Radius.

Synonyms

• Diameter: Width, breadth (through the center).
• Granulated sugar: White sugar, table sugar, refined sugar.

Notes on Usage

• The meaning is entirely determined by context. In a mathematical, scientific, or technical discussion, it almost always means "diameter." In cooking, dining, or everyday household contexts, it almost always means "granulated sugar."
• To avoid ambiguity, one can use "đường kính tròn" for "diameter" (though "đường kính" alone is standard in math) or specify the type of sugar, e.g., "đường trắng" for white sugar.

1. Granulated sugar
2. Diameter