The Collaborative International Dictionary of English v.0.48:

Sieva \Sie"va\, n. (Bot.)
   A small variety of the Lima bean (Phaseolus lunatus).
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lima \Li"ma\ (l[=e]"m[.a] or l[imac]"m[.a]), n.
   The capital city of Peru, in South America.
   [1913 Webster]

   Lima bean. (Bot.)
   (a) A variety of climbing or pole bean (Phaseolus lunatus),
       which has very large flattish seeds.
   (b) The seed of this plant, much used for food.

   Lima wood (Bot.), the beautiful dark wood of the South
      American tree C[ae]salpinia echinata.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bean \Bean\ (b[=e]n), n. [OE. bene, AS. be['a]n; akin to D.
   boon, G. bohne, OHG. p[=o]na, Icel. baun, Dan. b["o]nne, Sw.
   b["o]na, and perh. to Russ. bob, L. faba.]
   1. (Bot.) A name given to the seed of certain leguminous
      herbs, chiefly of the genera Faba, Phaseolus, and
      Dolichos; also, to the herbs.
      [1913 Webster]

   Note: The origin and classification of many kinds are still
         doubtful. Among true beans are: the black-eyed bean and
         China bean, included in Dolichos Sinensis; black
         Egyptian bean or hyacinth bean, Dolichos Lablab; the
         common haricot beans, kidney beans, string beans, and
         pole beans, all included in Phaseolus vulgaris; the
         lower bush bean, Phaseolus vulgaris, variety nanus;
         Lima bean, Phaseolus lunatus; Spanish bean and
         scarlet runner, Phaseolus multiflorus; Windsor bean,
         the common bean of England, Faba vulgaris.
         [1913 Webster] As an article of food beans are classed
         with vegetables.
         [1913 Webster]

   2. The popular name of other vegetable seeds or fruits, more
      or less resembling true beans.
      [1913 Webster]

   Bean aphis (Zool.), a plant louse (Aphis fab[ae]) which
      infests the bean plant.

   Bean fly (Zool.), a fly found on bean flowers.

   Bean goose (Zool.), a species of goose (Anser segetum).


   Bean weevil (Zool.), a small weevil that in the larval
      state destroys beans. The American species is Bruchus
      fab[ae].

   Florida bean (Bot.), the seed of Mucuna urens, a West
      Indian plant. The seeds are washed up on the Florida
      shore, and are often polished and made into ornaments.

   Ignatius bean, or St. Ignatius's bean (Bot.), a species
      of Strychnos.

   Navy bean, the common dried white bean of commerce;
      probably so called because an important article of food in
      the navy.

   Pea bean, a very small and highly esteemed variety of the
      edible white bean; -- so called from its size.

   Sacred bean. See under Sacred.

   Screw bean. See under Screw.

   Sea bean.
      (a) Same as Florida bean.
      (b) A red bean of unknown species used for ornament.

   Tonquin bean, or Tonka bean, the fragrant seed of
      Dipteryx odorata, a leguminous tree.

   Vanilla bean. See under Vanilla.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Phaseolus lunatus
    n 1: bush bean plant cultivated especially in southern United
         States having small flat edible seeds [syn: sieva bean,
         butter bean, butter-bean plant, lima bean, Phaseolus
         lunatus]