These clouds are made of ice crystals and are a thin, almost transparent whitish layer that may appear like a halo around the sun.

Cirriform clouds with a flat sheetlike appearance like a white veil.

A high cloud appearing as a whitish veil that may totally cover the sky. Often produces halo phenomena.

Transparent , whitish cloud veil of fibrous(hair-like) or smooth appearance ,totally or partly covering the sky and generally producing halo phenomena.

A cirriform cloud that develops from cirrus spreading out into a thin layer, creating a flat sheetlike appearance. It can give the sky a slightly milky or veiled look. When viewed from the surface of the earth, these ice crystals can create a halo effect around the sun or moon. This cloud is a good precursor of precipitation, indicating it may occur within 12 to 24 hours.

a high-level cloud which is composed mostly of ice crystals and has the appearance of a whitish veil which may totally cover the sky

Cirrus clouds with a flat sheetlike appearance.

Cirrus clouds with a flat sheet like appearance.