Definition

1. Noun:
   • Ultraviolet radiation: "UV" is an abbreviation for "ultraviolet," referring to electromagnetic radiation with a wavelength shorter than that of visible light but longer than X-rays. It is a type of energy from the sun that is invisible to the human eye.

Usage Examples

• Noun:
  • Excessive exposure to UV can damage your skin.
  • These sunglasses offer 100% protection against harmful UV.
  • The ozone layer helps to filter out much of the sun's UV.

Advanced Usage

• "UV index": a standard measurement of the strength of ultraviolet radiation from the sun at a particular place and time.
  • The weather forecast warned of a very high UV index today.
• "UV light" / "UV radiation": common compound terms specifying the type of light or radiation.
  • Some minerals fluoresce under UV light.
• "UV exposure": refers to the state of being subjected to ultraviolet radiation.
  • Minimize your UV exposure by seeking shade.

Variants and Related Words

• Ultraviolet (adj/n): the full form of "UV," used as an adjective or noun.
  • Ultraviolet rays are part of the electromagnetic spectrum.
• UV-A, UV-B, UV-C (n): specific bands of ultraviolet radiation.
  • UV-B rays are primarily responsible for sunburn.

Synonyms

• Ultraviolet radiation
• Ultraviolet light

Notes on Usage

• "UV" is almost always used as a noun in scientific, medical, and general contexts to refer to the radiation itself. It is a non-count noun.
• It is typically preceded by "the" or other determiners (e.g., ).
• While "UV" is an abbreviation, it is standard to write it in capital letters without periods.

Noun

1. radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays