rock·et 2 
(rŏkĭt)
(rŏkĭt)n.
1. See arugula.
2. Any of several plants of the mustard family, especially the dame's rocket and the sea rocket.
[Middle English rokette, from Old French roquete, from Italian rochetta, variant of ruchetta, diminutive of ruca, arugula, from Latin ērūca.]