Real Dictionary

pearl millet in American English
a tall cereal and forage grass (Pennisetum glaucum) having pearly white seeds borne in dense spikes
noun: a tall grass, Pennisetum americanum (or P. glaucum), cultivated in Africa, the Orient, and the southern U.S. for its edible seeds and as a forage plant

pearl millet in British English
noun: a tall grass, Pennisetum glaucum, cultivated in Africa, E Asia, and the southern US as animal fodder and for its pearly white seeds, which are used as grain