| Noun | 1. | family Ophioglossaceae - a family of succulent ferns of order Ophioglossales; cosmopolitan in distribution Ophioglossales, order Ophioglossales - coextensive with the family Ophioglossaceae genus Ophioglossum, Ophioglossum - the type genus of the fern family Ophioglossaceae Botrychium, genus Botrychium - grape fern; moonwort genus Helminthostachys, Helminthostachys - one species: terrestrial fern of southeastern Asia and Australia fern family - families of ferns and fern allies |