Cumulus is a type of cloud with the appearance of a lump of cotton wool.
Cumulus may also refer to:
Computing Cumulus (software), digital asset management software developed by Canto Software Cumulus Corporation, a defunct computer hardware company Cumulus Networks, a computer software company
Gliders Reinhard Cumulus, a West German glider US Aviation Cumulus, an American motorglider
Other uses Cumulus Media, a radio broadcasting company Cumulus (sculpture), a monumental sculpture by Karen LaMonte
See also Cumulus oophorus, cells which surround a human egg after fertilisation