1. Plural of cirrostratus; thin, wispy cloud formations composed of ice crystals, typically occurring at high altitudes and often creating a halo effect around the sun or moon.
Usage: meteorology; technical

Examples

• The meteorologist identified several cirrostratuses in the satellite imagery.
• Cirrostratuses often indicate that a weather system is approaching within the next 24 hours.
• The thin veil of cirrostratuses created a beautiful halo around the full moon.
• Pilots must be aware of cirrostratuses because they can affect visibility at high altitudes.
• The sky was covered with delicate cirrostratuses that diffused the afternoon sunlight.