from The Century Dictionary and Cyclopedia
- n. A ragged cumulus; an ill-defined cloud in the first stage of condensation and representing the tops of small, low atmospheric waves due to rapid winds near the surface of the ocean or land; scud. The fractocumulus is, relatively speaking, a low cloud, lying some distance below the fiat base of the ordinary cumulus. See cloud, 1.
Sorry, no etymologies found.