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obelia

o·be·lia [ ō blyə ] (plural o·be·lias)


noun 
Definition:
 
polyp that forms colonies: an ocean hydrozoan polyp that forms colonies that resemble moss on rocks, ships' hulls, and piles. Genus Obelia.

[Late 19th century. < modern Latin< Greek obelias "leaf baked on a spit" < obelos "spit"]
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