filmy fern

from The Century Dictionary.

• See fern.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• 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
• noun any fern of the genus Hymenophyllum growing in tropical humid regions and having translucent leaves