filmy fern Meaning, Definition & Usage
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       noun 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.
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       noun any fern of the genus Hymenophyllum growing in tropical humid regions and having translucent leaves
       
       
film fern.