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 phy·sa·lia /faɪˈselɪə/ 名詞

 Phy·sa·li·a prop. n.  Zool. A genus of large oceanic Siphonophora which includes the Portuguese man-of-war.
 Note: ☞ It has a large air sac, or float, with a sail-like crest on its upper side. Numerous zooids of different kinds are attached to the under side of the float. Some of the zooids have very long tentacles; some have a mouth and digest food; others produce gonophores. The American species (Physalia arethusa) is brilliantly colored, the float being pink or purple, and bright blue; the zooids blue. It is noted for its virulent stinging powers, as well as for its beautiful colors, graceful motions, and its ability to sail to windward.
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 Physalia
      n : Portuguese man-of-war [syn: genus Physalia]