fractocumulus noun plural -li (-ˌlaɪ) low ragged slightly bulbous cloud, often appearing below nimbostratus clouds during rainAlso called: fractocumulus cloud Liberaldictionary.com
Word Origin for fractocumulus C19: from Latin fractus broken + cumulus Collins English Dictionary – Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012