Physograde

1 definition found

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

  Physograde \Phys"o*grade\, n. [Gr. fy^sa a bellows + L. gradi to
     walk, go.] (Zool.)
     Any siphonophore which has an air sac for a float, as the
     Physalia.
     [1913 Webster]