[1] : The Collaborative International Dictionary of English v.0.48

rocket \rock"et\, n. f. roquette cf. sp. ruqueta, it
   ruchetta, fr. l. eruca. bot.
   a a cruciferous plant eruca sativa sometimes eaten in
       europe as a salad.
   b damewort.
   c rocket larkspur. see below.
       1913 webster

   dyer's rocket. bot. see dyer's broom, under broom.

   rocket larkspur bot., an annual plant with showy flowers
      in long racemes delphinium ajacis.

   sea rocket bot., either of two fleshy cruciferous plants
      cakile maritima and cakile americana found on the
      seashore of europe and america.

   yellow rocket bot., a common cruciferous weed with yellow
      flowers barbarea vulgaris.
      1913 webster
see also:
eruca sativa dyer's rocket dyer's broom broom rocket larkspur delphinium ajacis 
sea rocket cakile maritima cakile americana yellow rocket barbarea vulgaris 

[2] : WordNet (r) 2.0

delphinium ajacis
     n : commonly cultivated larkspur of southern europe having
         unbranched spikelike racemes of blue or sometimes
         purplish or pinkish flowers; sometime placed in genus
         delphinium syn: rocket larkspur, consolida ambigua
see also:
rocket larkspur consolida ambigua 

Delphinium >> D Words
Delphinium, definition of term: Delphinium
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