Definition of hordeum
1 capitalized : a widely distributed genus of grasses having the flowers in dense spikes often with long-awned glumes and the one-flowered spikelets in clusters of two or three at each joint of the rachis — see barley
2 plural -s : any grass of the genus Hordeum
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Origin and Etymology of hordeum
New Latin, from Latin, barley; akin to Old High German gersta barley, Greek kri, Albanian drith, and probably to Latin horrēre to bristle
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