lồi

Thân thiện

Một hòn đá lồi lên trên mặt đất.

Definition

1. Adjective:
   • Convex: Having a surface or shape that curves or bulges outward, like the exterior of a sphere or a lens.
   • Prominent / Bulging / Protruding: Sticking out from a surface; projecting outward.

Usage Examples

• Adjective:
  • Kính lúp có thấu kính lồi. (A magnifying glass has a convex lens.)
  • Con ếch có đôi mắt lồi. (The frog has bulging eyes.)
  • Bề mặt của quả bóng là một mặt lồi. (The surface of a ball is a convex surface.)

Advanced Usage

• In Mathematics (Geometry): A convex polygon is one where all interior angles are less than 180°, and any line segment connecting two points inside the polygon lies entirely within it.
  • Hình tam giác là một đa giác lồi. (A triangle is a convex polygon.)

Variants and Related Words

• Lồi lõm (adj): Uneven, bumpy; convex and concave. Describes a surface with alternating protrusions and indentations.
  • Con đường lồi lõm nhiều ổ gà. (The road is bumpy with many potholes.)

Synonyms

• Convex: Curved outward.
• Bulging: Swelling outward.
• Protruding: Extending beyond the main surface.

Related Idioms

• Mắt lồi: A descriptive phrase meaning "protruding eyes."
  • Cá vàng có mắt lồi. (Goldfish have protruding eyes.)

Học thuật

adj

1. convex; prominent
   • lồi lõm
     convex and concave