Comment by adrian_b

In this case it is misspelled.

The Latin word is "flocci", which means hairs of wool, and it was also used to denote an insignificant thing.

English normally preserves the double consonants of Latin, and in this case it has already done this in the English words derived from "floccus", e.g. "to flocculate" and "flocculent".

In clouds, it was used due to the resemblance of those clouds with curly sheep wool.