Cystopteris cys·top·te·ris uncommon noun 1. chiefly small perennial rock ferns: bladder ferns; in some classifications placed in Polypodiaceae Synonymsgenus Cystopteris Related words Word family Cystopteris bulbiferaCystopteris fragilisCystopteris montana Broader terms fern genus Parts Dryopteridaceae Part of bladder fern WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
