ˈtrid.ə̇kəm noun
Etymology: New Latin, from Latin, wheat; akin to Latin terere to rub, thresh — more at throw
1. capitalized : a genus of cereal grasses including the wheats and distinguished by the 2- to 5-flowered flattened spikelets in a terminal cylindrical spike with a flexuous rachis
2. -s : the dried rhizome of a couch grass ( Agropyron repens )