Velella is a cosmopolitan genus of free-floating hydrozoans that live on the surface of the open ocean. There is only one known species, Velella velella, in the genus. Velella velella is commonly known by the names sea raft, by-the-wind sailor, purple sail, little sail, or simply Velella. These small cnidarians are part of a specialised ocean surf...
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http://en.wikipedia.org/wiki/Velella
• (n.) Any species of oceanic Siphonophora belonging to the genus Velella.
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http://thinkexist.com/dictionary/meaning/velella/
<zoology> Any species of oceanic Siphonophora belonging to the genus Velella. ... These creatures are brilliantly coloured and float at the surface of the sea. They have an oblong, disklike body, supported by a thin chitinous plate, from which rises a thin diagonal crest which acts as a sail. The feeding and reproductive zooids hang down from...
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http://www.encyclo.co.uk/local/20973
Ve·lel'la noun [ New Latin , dim. from Latin
velum a veil, a sail.]
(Zoology) Any species of oceanic Siphonophora belonging to the genus
Velella . » These creatures are brilliantly colored and float at the surface of the sea. They have an oblong, disklike body, support...
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http://www.encyclo.co.uk/webster/V/11
Velella is a member of the order Siphonophora.
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The Velella was an Italian Argo Class coastal submarine of 689 tons displacement built for the Portuguese navy in 1936, but taken over by Italy when the contract was cancelled. The Velella was powered by Fiat diesel engines and two electric motors providing a top speed of 14 knots surfaced and 8 knots submerged and was armed with one 3.9 inch gun; ...
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http://www.probertencyclopaedia.com/browse/RV.HTM
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