Agropyron ag·ro·py·ron uncommon noun 1. perennial grasses of temperate and cool regions: wheatgrass; dog grass Synonymsgenus Agropyron Related words Word family Agropyron cristatumAgropyron intermediumAgropyron pauciflorumAgropyron repensAgropyron smithiiAgropyron subsecundumAgropyron trachycaulum Broader terms monocot genus Parts Gramineae Part of wheatgrass WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.