prairie rocket prai·rie·roc·ket uncommon noun 1. any of several North American plants of the genus Erysimum having large yellow flowers Synonymsprairie rocket 2. any of several western American plants of the genus Cheiranthus having large yellow flowers Synonymsprairie rocket Related words Broader terms flower Parts CheiranthusErysimum WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
