genus Echinochloa ge·nu·sec·hinochloa uncommon noun 1. annual or perennial succulent grasses of warm regions SynonymsEchinochloagenus Echinochloa Related words Broader terms monocot genus Parts Gramineae Part of barnyard grassJapanese millet WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.