The Collaborative International Dictionary of English v.0.48:

Lupine \Lu"pine\, n. [L. lupinus, lupinum, apparently fr.
   lupinus belonging to a wolf, fr. lupus a wolf; perh. so
   called because it was supposed to exhaust the soil: cf. F.
   lupin. Cf. Wolf.] (Bot.)
   A leguminous plant of the genus Lupinus, especially
   Lupinus albus, the seeds of which have been used for food
   from ancient times. The common species of the Eastern United
   States is Lupinus perennis. There are many species in
   California.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lupinine \Lu"pin*ine\, n. (Chem.)
   An alkaloid found in several species of lupine (Lupinus
   luteus, Lupinus albus, etc.), and extracted as a bitter
   crystalline substance, having a formula C10H19NO. Called
   also l-lupinine
   [1913 Webster]

   Note: Chemically it is a a bicyclic saturated quinolizine
         [1-R-trans]-Octahydro-2H-quinolizine-1-methanol, with
         the structure:
         CH2OH | /\ H /\ / \|/ \ | | | | N | \ / \ / \/ \/
         --[MI11]
         [PJC]

WordNet (r) 3.0 (2006):

Lupinus albus
    n 1: white-flowered Eurasian herb widely cultivated for forage
         and erosion control [syn: white lupine, field lupine,
         wolf bean, Egyptian lupine, Lupinus albus]