A cloud at a high altitude consisting of a series of regularly arranged small clouds resembling ripples WordNet 3.0 & Open English WordNet

Cirrocumulus is one of the three main genus types of high-altitude tropospheric clouds, the other two being cirrus and cirrostratus. Wikipedia

Type of high-altitude cloud Wikidata

A principal high-level cloud type appearing as a thin, white patch of cloud without shadows, composed of very small droplets in the form of grains or ripples. The elements may be merged or separate, and more or less regularly arranged; they subtend an angle of less than 1° when observed at an angle of more than 30° above the horizon. Holes or rifts often occur in a sheet of cirrocumulus. Abbreviated Cc. Wiktionary

A cloud type. Wiktionary (translation)