Juglans regia

Juglans regia
    n 1: Eurasian walnut valued for its large edible nut and its
         hard richly figured wood; widely cultivated [syn: {English
         walnut}, {English walnut tree}, {Circassian walnut},
         {Persian walnut}, {Juglans regia}]
    

Juglandin \Jug"lan*din\, n. [L. juglans, -andis, a walnut: cf.
   F. juglandine.] (Chem.)
   An extractive matter contained in the juice of the green
   shucks of the walnut ({Juglans regia}). It is used
   medicinally as an alterative, and also as a black hair dye.
   [1913 Webster]
    

Juglandine \Jug"lan*dine\, n.
   An alkaloid found in the leaves of the walnut ({Juglans
   regia}).
   [1913 Webster]
    

Juglone \Ju"glone\, n. [L. juglans the walnut + -one.] (Chem.)
   A yellow crystalline substance ({C10H6O3}) resembling
   quinone, extracted from green shucks of the walnut ({Juglans
   regia}); -- called also {nucin}. Chemically, it is
   5-hydroxy-1,4-naphthalenedione.
   [1913 Webster]
    

Madeira \Ma*dei"ra\, n. [Pg., the Island Madeira, properly,
   wood, fr. L. materia stuff, wood. The island was so called
   because well wooded. See {Matter}.]
   A rich wine made on the Island of Madeira.
   [1913 Webster]

         A cup of Madeira, and a cold capon's leg. --Shak.
   [1913 Webster]

   {Madeira nut} (Bot.), the European walnut; the nut of the
      {Juglans regia}.
      [1913 Webster]
    

Walnut \Wal"nut\, n. [OE. walnot, AS. wealh-hnutu a Welsh or
   foreign nut, a walnut; wealh foreign, strange, n., a
   Welshman, Celt (akin to OHG. Walh, properly, a Celt, from the
   name of a Celtic tribe, in L. Volcae) + hnutu a nut; akin to
   D. walnoot, G. walnuss, Icel. valhnot, Sw. valn["o]t, Dan
   valn["o]d. See {Nut}, and cf. {Welsh}.] (Bot.)
   The fruit or nut of any tree of the genus {Juglans}; also,
   the tree, and its timber. The seven or eight known species
   are all natives of the north temperate zone.
   [1913 Webster]
   [1913 Webster]

   Note: In some parts of America, especially in New England,
         the name walnut is given to several species of hickory
         ({Carya}), and their fruit.
         [1913 Webster]

   {Ash-leaved walnut}, a tree ({Juglans fraxinifolia}), native
      in Transcaucasia.

   {Black walnut}, a North American tree ({Juglans nigra})
      valuable for its purplish brown wood, which is extensively
      used in cabinetwork and for gunstocks. The nuts are
      thick-shelled, and nearly globular.

   {English walnut}, or {European walnut}, a tree ({Juglans
      regia}), native of Asia from the Caucasus to Japan,
      valuable for its timber and for its excellent nuts, which
      are also called {Madeira nuts}.

   {Walnut brown}, a deep warm brown color, like that of the
      heartwood of the black walnut.

   {Walnut oil}, oil extracted from walnut meats. It is used in
      cooking, making soap, etc.

   {White walnut}, a North American tree ({Juglans cinerea}),
      bearing long, oval, thick-shelled, oily nuts, commonly
      called {butternuts}. See {Butternut}.
      [1913 Webster]