family Cyatheaceae fa·mi·ly·cyatheaceae uncommon noun 1. buckwheat; in some classifications included in the genus Polygonum SynonymsCyatheaceaefamily Cyatheaceae Related words Broader terms fern family Parts Filicopsida Part of Cyathea WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
