Meaning

noun usually coiled

noun a wispy white cloud (usually of fine ice crystals) at a high altitude (4 to 8 miles)

noun a slender flexible animal appendage as on barnacles or crinoids or many insects; often tactile

originLearned borrowing from Latin cirrī, the nominative or vocative plural of cirrus.

Etymology from Wiktionary, CC BY-SA 3.0