ve·lel·la | \ və̇ˈlelə \
Definition of velella
1 capitalized : a genus of floating oceanic siphonophores widely distributed in warm seas and closely related to those of the genus Porpita but having an oblique crest which acts as a sail and often causes the animal to be drifted to coasts remote from its native habitat
2 plural -s : any animal of the genus Velella
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