ˌ ̷ ̷ ̷ ̷ ̷ ̷ˈfiləm noun
Usage: capitalized
Etymology: New Latin, from hymen- + -phyllum
: a genus (the type of the family Hymenophyllaceae) of tropical hygrophytic and usually epiphytic ferns distinguished from Trichomanes by having the valves of the involucre bearing the sporangia separate