a European annual (Eruca vesicaria sativa) of the crucifer family, sometimes cultivated as a pungent salad herb; rocket
See arugula in American Heritage Dictionary 4
(ə-ro͞oˈgə-lə)
noun
A Mediterranean plant (Eruca vesicaria subsp. sativa) having flowers with purple-veined, yellowish-white petals and pungent, edible leaves. Also called rocket2, rocket salad, roquette.