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From: WordNet (r) 2.0

 class Cycadopsida
      n : palmlike gymnosperms: includes the surviving order Cycadales
          and several extinct orders; possibly not a natural group;
          in some systems considered a class (Cycadopsida) and in
          others a subdivision (Cycadophytina or Cycadophyta) [syn:
           Cycadopsida, Cycadophytina, subdivision
           Cycadophytina, Cycadophyta, subdivision Cycadophyta]