floccule vs floccus

floccule

noun
  • A small, loosely aggregated mass of material suspended in, or precipitated from a solution; a floc. 

floccus

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

  • 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. 

How often have the words floccule and floccus occurred in a corpus of books? (source: Google Ngram Viewer )