cirro-, cirr-, cirri- +
(Latin: curl, ringlet; tuft of hair, fringe; by extension, filament, tendril)
2. Resembling a tendril or cirrus.
2. A slender tentacle with sensory or locomotive function, or a part resembling one.
3. A filament or slender appendage serving as a foot, tentacle, barbel, etc.
4. The male copulatory organ of flatworms and various other invertebrates.
5. A slender flexible animal appendage; such as, those on barnacles or crinoids or many insects; often tactile.
6. A structure formed from a cluster of tuft of fused cilia, constituting one of the sensory or locomotor organs of certain ciliate protozoa.
Cirrus clouds are composed of small particles, mostly ice crystals, that are fairly widely dispersed, usually resulting in relative transparency and whiteness and often producing a halo phenomena (colored or whitish rings, arcs, pillars or spots of light) which are not observed with other cloud forms.