The Collaborative International Dictionary of English v.0.48:

Cycadophyta \Cycadophyta\, Cycadophytina \Cycadophytina\,
Cycadopsida \Cycadopsida\n.
   a class or subdivision of plants comprising palmlike
   gymnosperms: it 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: class Cycadopsida, subdivision Cycadophytina,
        subdivision Cycadophyta.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Cycadophyta
    n 1: 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, class Cycadopsida,
         Cycadophytina, subdivision Cycadophytina,
         Cycadophyta, subdivision Cycadophyta]