Adjective
Formed like a cirrus or tendril; -- said of appendages of both animals and plants.
Source: Webster's dictionaryAll cirriform clouds are classified as high and thus constitute a single genus cirrus (Ci). Source: Internet
The high-étage clouds are all cirriform, one of which, cirrocumulus, is also cumuliform of limited convection or stratocumuliform. Source: Internet
Clouds of the more detached tufted floccus species are also subdivisions of genus-types which may be cirriform or stratocumuliform. Source: Internet
Partly unstable cirriform and stratocumuliform species These species are subdivisions of genus types that occur in partly unstable air. Source: Internet
Types and subtypes Noctilucent (extremely high cirriform) *Type 1: The first type is characterized by very tenuous filaments resembling cirrus fibratus. Source: Internet