WordNet (r) 3.0 (2006):

subdivision Coniferophytina
    n 1: cone-bearing gymnosperms dating from the Carboniferous
         period; most are substantial trees; includes the classes
         Pinopsida (subdivision Pinophytina) and Ginkgopsida
         (subdivision Ginkgophytina) and Taxopsida (subdivision
         Taxophytina) which in turn include the surviving orders
         Coniferales and Taxales (yews) and sometimes Ginkgoales as
         well as extinct orders such as Cordaitales (of the
         Carboniferous and Permian) [syn: Coniferopsida, class
         Coniferopsida, Coniferophytina, subdivision
         Coniferophytina, Coniferophyta]