The Collaborative International Dictionary of English v.0.48:

Trichomanes \Tri*chom"a*nes\, n. [L., a kind of plant, from Gr.
   ?.] (Bot.)
   Any fern of the genus Trichomanes. The fronds are very
   delicate and often translucent, and the sporangia are borne
   on threadlike receptacles rising from the middle of
   cup-shaped marginal involucres. Several species are common in
   conservatories; two are native in the United States.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Trichomanes
    n 1: bristle ferns; kidney ferns [syn: Trichomanes, genus
         Trichomanes]