Definition

1. Noun:
   • The visual property of something having a milky brightness and a play of colors from the surface: Opalescence is the quality of reflecting light with a soft, milky iridescence, often showing shifting colors like those seen in an opal gemstone.

Usage Examples

• Noun:
  • The opalescence of the antique glass vase made it shimmer in the sunlight.
  • Scientists study the opalescence of certain liquids to understand their structural properties.

Advanced Usage

• Technical/Scientific Context: In physics and chemistry, "opalescence" can describe the cloudy iridescence exhibited by some colloidal solutions or when a substance is near its critical point.
  • The liquid exhibited critical opalescence as it was heated, scattering light dramatically.

Variants and Related Words

• Opalescent (adj): Having the quality of opalescence; exhibiting a milky iridescence.
  • The lamp was made from opalescent glass.
• Opalesce (verb, rare): To exhibit or give off opalescence.
  • The solution began to opalesce under the specific lighting conditions.

Synonyms

• Iridescence: A display of lustrous, changing colors.
• Pearlescence: Having a luster like that of a pearl.
• Milky luminescence: A soft, white light emission.

Antonyms

• Dullness: Lacking brightness or shine.
• Opacity: The quality of not allowing light to pass through; lacking translucency.

Related Phrases and Terms

• Play of colors: A phrase often associated with opalescence, describing the shifting colors seen on the surface.
• Critical opalescence: A specific scientific phenomenon where a fluid becomes milky and highly light-scattering near its critical point.

Noun

1. the visual property of something having a milky brightness and a play of colors from the surface