floccus

/F L AA1 K AH0 S/
noun
  1. 1

    A cloud species which consists of rounded tufts of cloud, often formed by dissipation from larger cloud species. Associated with cirrus, cirrocumulus, altocumulus, and stratocumulus genera.

  2. 2

    A flock or tuft of wool or wool-like hairs; the downy plumage of unfledged birds.

Source: https://en.wiktionary.org/wiki/floccus