cirrus
Concise Oxford English Dictionary © 2008 Oxford University Press:
cirrus /ˈsɪrəs/
▶noun (pl. cirri /-rʌɪ/)
- 1 cloud forming wispy streaks at high altitude.
- 2 Zoology a slender tendril or hair-like filament, e.g. the barbel of a fish.
■ Botany a tendril.
– origin C18: from L., lit. ‘a curl’.
'cirrus' also found in these Oxford entries:

