Hydrophyllia

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Hydrophyllium \Hy`dro*phyl"li*um\, n.; pl. L. {Hydrophyllia}, E.
     {Hydrophylliums}. [NL., fr. Gr. "y`dwr water + ? a leaf.]
     (Zool.)
     One of the flat, leaflike, protective zooids, covering other
     zooids of certain Siphonophora.
     [1913 Webster]