Polyactinia

1 definition found

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

  Polyactinia \Pol`y*ac*tin"i*a\, n. pl. [NL. See {Poly-}, and
     {Actinia}.] (Zool.)
     An old name for those Anthozoa which, like the actinias, have
     numerous simple tentacles.
     [1913 Webster]