Definition

1. Noun:
   • Reef: A ridge of jagged rock, coral, or sand just above or below the surface of the sea, which is a hazard to navigation.

Usage Examples

• Noun:
  • Tàu đánh cá tránh khu vực có ám tiêu. (The fishing boat avoids the area with reefs.)
  • Ám tiêu san hô là nơi sinh sống của nhiều loài cá. (Coral reefs are home to many species of fish.)
  • Con tàu đắm sau khi đâm phải một ám tiêu ngầm. (The ship sank after hitting a submerged reef.)

Advanced Usage

• The term "ám tiêu" is primarily used in geographical, geological, and maritime contexts. It is a formal and technical term.

Variants and Related Words

• Đá ngầm (n): submerged rock, another term for a rocky reef or shoal.
  • Khu vực này nguy hiểm vì có nhiều đá ngầm. (This area is dangerous because of many submerged rocks.)

Synonyms

• Reef: A bar of rock or coral in the sea.
• Shoal: A shallow area in a body of water, often formed by sand or rock.

Related Terms

• Rạn san hô (n): coral reef (specifies the reef is made of coral).
  • Rạn san hô Great Barrier là hệ thống ám tiêu lớn nhất thế giới. (The Great Barrier Reef is the world's largest reef system.)