um·brel·la 
(ŭm-brĕlə)
(ŭm-brĕlə)n.
1. A device for protection from the weather consisting of a collapsible, usually circular canopy mounted on a central rod.
2.
a. Something shaped like an umbrella: the umbrella of a mushroom.
b. The gelatinous, rounded mass that makes up the major part of the medusa stage of most jellyfish and certain other cnidarians.
3.
a. Something that covers or protects: The researcher's job was saved by the umbrella of academic freedom.
b. Air cover, especially during a military operation.
[Italian ombrella, from Late Latin umbrella, alteration (influenced by umbra, shade) of Latin umbella, parasol; see UMBEL.]
um·brella·less adj.
- organism
- organismal
- organismic
- organismically
- organist
- organization
- organizational
- organizationally
- organize
- organized
- organized crime
- organizer
- organo-
- organochlorine
- organ of Corti
- organogenesis
- organogenetic
- organogenetically
- organographic
- organographically
- organography
- organoleptic
- organoleptically
- organologic
- organological