It is used in meteorology to describe high-level clouds that are thin, wispy, and feathery in appearance, resembling curls or locks of hair. This is because cirro clouds are composed of ice crystals and are typically found at altitudes of 16,500 feet (5,000 meters) or higher.
Some examples of words using the root cirro are:
* Cirrocumulus: A type of high-level cloud with small, white, puffy clouds arranged in rows.
* Cirrostratus: A type of high-level cloud that appears as a thin, sheet-like veil across the sky.
* Cirrus: A general term for high-level clouds that are thin and wispy.
In summary, cirro indicates high-level clouds, particularly those with a wispy, feathery appearance reminiscent of curls or locks of hair.