WordNet (r) 3.0 (2006):

subdivision 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]