Answer: cirri

AnswerCrossword Clue
CIRRI

High-altitude clouds

CIRRI

High wispy clouds

CIRRI

Barnacle appendages

CIRRI
Sea-lily appendages
CIRRI
Wispy clouds
CIRRIWispy white clouds
CIRRIHigh, wispy clouds
CIRRIWhispy white clouds
CIRRISome high clouds
CIRRIOverhead wisps
CIRRIFair-weather clouds
CIRRIHigh clouds
CIRRIFilmy, wavy clouds.
CIRRIFilmy white clouds.
CIRRIFilmy, fleecy clouds.
CIRRIFormations of fleecy clouds.
CIRRIFleecy clouds.
CIRRIFleecy high clouds.
CIRRIFilmy clouds.
CIRRIClouds
CIRRICloud formations
CIRRIFleecy clouds
CIRRIMare's-tail clouds
CIRRIPlant tendrils
CIRRITendrils
CIRRISky sight
CIRRIThey're no rain-makers
CIRRIMars atmosphere features
CIRRIAtmospheric features of Mars
CIRRIThey're no rainmakers
CIRRISky sights
CIRRIThey're comprised of ice crystals