Source : WordNet®

class Ginkgopsida
     n : ginkgos: in some systems classified as a class (Ginkgopsida)
         and in others as a subdivision (Ginkgophytina or
         Ginkgophyta); used in some classifications for one of
         five subdivisions of Gymnospermophyta [syn: {Ginkgopsida},
          {Ginkgophytina}, {subdivision Ginkgophytina}, {Ginkgophyta}]