WordNet (r) 3.0 (2006):

holly fern
    n 1: any of various ferns of the genus Polystichum having fronds
         with texture and gloss like holly
    2: tropical Old World fern having glossy fronds suggestive of
       holly; sometimes placed in genus Polystichum [syn: holly
       fern, Cyrtomium aculeatum, Polystichum aculeatum]