1. a high-altitude cloud formation consisting of thin, wispy strands of ice crystals
Usage: meteorology
2. a slender, flexible appendage or tendril found on certain animals or plants
Usage: biology

Examples

• The cirrus clouds stretched across the blue sky like delicate brushstrokes.
• High cirrus formations often indicate changing weather patterns.
• The pilot noticed cirrus clouds at 30,000 feet during the flight.
• Meteorologists study cirrus clouds to predict atmospheric conditions.
• The barnacle extended its cirrus to filter food from the water.
• Each cirrus on the sea anemone helped it capture small prey.