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1. Any fern of the genus Trichomanes having large pinnatifid often translucent fronds; most are epiphytic on tree branches and twigs or terrestrial on mossy banks
   - bristle fern
    
2. Any fern of the genus Hymenophyllum growing in tropical humid regions and having translucent leaves
   - film fern

Derived forms: filmy ferns

Type of: fern

Part of: genus Hymenophyllum, genus Trichomanes, Hymenophyllum, Trichomanes

Encyclopedia: Filmy fern