mắt đơn

Con bướm có những mắt đơn trên cánh.

Definition

1. Noun:
   • Simple eye / Ocellus: A small, simple visual organ found in some invertebrates, such as insects and spiders. It typically consists of a single lens and detects light intensity and direction, but does not form complex images like compound eyes.
   • Eye spot: A marking on an animal (like on the wings of a butterfly or feathers of a peacock) that resembles an eye, often used to startle predators or for display.

Usage Examples

• Noun:
  • Con bướm có những mắt đơn trên cánh. (The butterfly has ocelli on its wings.)
  • Nhiều loài côn trùng có cả mắt kép và mắt đơn. (Many insects have both compound eyes and simple eyes.)
  • Chiếc lông công có mắt đơn rất đẹp. (The peacock feather has a beautiful eye spot.)

Advanced Usage

• In entomology, "mắt đơn" (ocelli) are often distinguished from "mắt kép" (compound eyes). They are usually located on the top of an insect's head.
  • Ba mắt đơn trên đỉnh đầu giúp ong định hướng theo ánh sáng mặt trời. (The three ocelli on the top of the head help the bee orient itself using sunlight.)

Variants and Related Words

• Mắt kép (n): Compound eye. A complex visual organ found in arthropods, composed of many small visual units.
  • Mắt kép của chuồn chuồn có tầm nhìn rất rộng. (The dragonfly's compound eye has a very wide field of view.)

Synonyms

• Ocellus: The precise scientific term for a simple eye.
• Simple eye: A direct descriptive synonym.
• Eye spot: A marking that resembles an eye.

Notes

• The term "mắt đơn" is primarily used in scientific or zoological contexts. In everyday conversation, it is less common than general words for "eye" (mắt).