Source : Webster's Revised Unabridged Dictionary (1913)

Mock \Mock\, a.
   Imitating reality, but not real; false; counterfeit; assumed;
   sham.

         That superior greatness and mock majesty. --Spectator.

   {Mock bishop's weed} (Bot.), a genus of slender umbelliferous
      herbs ({Discopleura}) growing in wet places.

   {Mock heroic}, burlesquing the heroic; as, a mock heroic
      poem.

   {Mock lead}. See {Blende} (
   a ).

   {Mock nightingale} (Zo["o]l.), the European blackcap.

   {Mock orange} (Bot.), a genus of American and Asiatic shrubs
      ({Philadelphus}), with showy white flowers in panicled
      cymes. {P. coronarius}, from Asia, has fragrant flowers;
      the American kinds are nearly scentless.

   {Mock sun}. See {Parhelion}.

   {Mock turtle soup}, a soup made of calf's head, veal, or
      other meat, and condiments, in imitation of green turtle
      soup.

   {Mock velvet}, a fabric made in imitation of velvet. See
      {Mockado}.

Orange \Or"ange\, n. [F.; cf. It. arancia, arancio, LL. arangia,
   Sp. naranjia, Pg. laranja; all fr. Ar. n[=a]ranj, Per.
   n[=a]ranj, n[=a]rang; cf. Skr. n[=a]ranga orange tree. The o-
   in F. orange is due to confusion with or gold, L. aurum,
   because the orange resembles gold in color.]
   1. The fruit of a tree of the genus {Citrus} ({C.
      Aurantium}). It is usually round, and consists of pulpy
      carpels, commonly ten in number, inclosed in a leathery
      rind, which is easily separable, and is reddish yellow
      when ripe.

   Note: There are numerous varieties of oranges; as, the
         {bitter orange}, which is supposed to be the original
         stock; the {navel orange}, which has the rudiment of a
         second orange imbedded in the top of the fruit; the
         {blood orange}, with a reddish juice; and the {horned
         orange}, in which the carpels are partly separated.

   2. (Bot.) The tree that bears oranges; the orange tree.

   3. The color of an orange; reddish yellow.

   {Mandarin orange}. See {Mandarin}.

   {Mock orange} (Bot.), any species of shrubs of the genus
      {Philadelphus}, which have whitish and often fragrant
      blossoms.

   {Native orange}, or {Orange thorn} (Bot.), an Australian
      shrub ({Citriobatus parviflorus}); also, its edible yellow
      berries.

   {Orange bird} (Zo["o]l.), a tanager of Jamaica ({Tanagra
      zena}); -- so called from its bright orange breast.

   {Orange cowry} (Zo["o]l.), a large, handsome cowry
      ({Cypr[ae]a aurantia}), highly valued by collectors of
      shells on account of its rarity.

   {Orange grass} (Bot.), an inconspicuous annual American plant
      ({Hypericum Sarothra}), having minute, deep yellow
      flowers.

   {Orange oil} (Chem.), an oily, terpenelike substance obtained
      from orange rind, and distinct from neroli oil, which is
      obtained from the flowers.

   {Orange pekoe}, a kind of black tea.

   {Orange pippin}, an orange-colored apple with acid flavor.

   {Quito orange}, the orangelike fruit of a shrubby species of
      nightshade ({Solanum Quitoense}), native in Quito.

   {Orange scale} (Zo["o]l.) any species of scale insects which
      infests orange trees; especially, the purple scale
      ({Mytilaspis citricola}), the long scale ({M. Gloveri}),
      and the red scale ({Aspidiotus Aurantii}).

Source : WordNet®

mock orange
     n 1: large hardy shrub with showy and strongly fragrant
          creamy-white flowers in short terminal racemes [syn: {syringa},
           {Philadelphus coronarius}]
     2: shrubby thorny deciduous tree of southeastern United States
        with white flowers and small black drupaceous fruit [syn:
        {southern buckthorn}, {shittimwood}, {shittim}, {Bumelia
        lycioides}]
     3: small flowering evergreen tree of southern United States
        [syn: {cherry laurel}, {laurel cherry}, {wild orange}, {Prunus
        caroliniana}]
     4: small shrubby deciduous yellowwood tree of south central
        United States having spines, glossy dark green leaves and
        an inedible fruit that resembles an orange; its hard
        orange-colored wood used for bows by native Americans;
        frequently planted as boundary hedge [syn: {osage orange},
         {bow wood}, {Maclura pomifera}]