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Meaning of Portuguese man-of-war

Por'tuguese man-of-war'

Pronunciation: [key]
  1. any of several large, oceanic hydrozoans of the genus Physalia, having a large, bladderlike structure with a saillike crest by which they are buoyed up and from which dangle tentacles with stinging cells.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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