Definition

1. Adjective: Having the property of emitting light by itself, without needing to reflect light from another source.

Usage

The adjective "self-luminous" is used to describe an object or body that produces and emits its own light. It is a technical term commonly found in physics, astronomy, and optics. It contrasts with objects that are visible only because they reflect light from a self-luminous source.

Examples

• Scientific Context:
  • Stars are self-luminous celestial bodies.
  • The sun is a self-luminous sphere of plasma.
• Technical/General Context:
  • Certain deep-sea fish have self-luminous organs for communication and hunting.
  • A light bulb is a self-luminous object when it is switched on.

Advanced Usage

• "self-luminous source": A common technical phrase referring to the origin of light.
  • In the experiment, we used a laser as a self-luminous source.

Variants and Related Words

• Luminous (adj): Emitting or reflecting light; bright. ("Luminous" is a broader term that can include both self-luminous and reflective objects.)
• Incandescent (adj): Emitting light as a result of being heated. (A specific type of self-luminous object.)
• Bioluminescent (adj): (Of a living organism) emitting light. (A biological form of being self-luminous.)

Synonyms

• Light-emitting
• Radiant (in the sense of emitting light)
• Glowing (when referring to emitting sustained light)

Antonyms

• Non-luminous
• Opaque (blocking light)
• Reflective (shining by reflecting light from elsewhere)

Adjective

1. having in itself the property of emitting light