Echinochloa ec·hi·noch·loa uncommon noun 1. annual or perennial succulent grasses of warm regions Synonymsgenus Echinochloa Related words Word family Echinochloa crusgalliEchinochloa frumentacea 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.