Lem·on n.
 1. Bot. An oval or roundish fruit resembling the orange, and containing a pulp usually intensely acid. It is produced by a tropical tree of the genus Citrus, the common fruit known in commerce being that of the species Citrus Limonum or Citrus Medica (var. Limonum). There are many varieties of the fruit, some of which are sweet.
 2. The tree which bears lemons; the lemon tree.
 Lemon grass Bot., a fragrant East Indian grass (Andropogon Shœnanthus, and perhaps other allied species), which yields the grass oil used in perfumery.
 Lemon sole Zool., a yellow European sole (Solea aurantiaca).
 Salts of lemon Chem., a white crystalline substance, inappropriately named, as it consists of an acid potassium oxalate and contains no citric acid, which is the characteristic acid of lemon; -- called also salts of sorrel. It is used in removing ink stains. See Oxalic acid, under Oxalic. [Colloq.]

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 Lime, n.
 1. Bot. The fruit of the Citrus aurantifolia, allied to the lemon, but greener in color; also, the tree which bears it.
 Note: The term lime was formerly also applied to variants of the closely related citron, of which there are two varieties, Citrus Medica, var. acida which is intensely sour, and the sweet lime (Citrus Medica, var. Limetta) which is only slightly sour.  See citron.


 Ce·drat n.  Bot. Properly the citron, a variety of Citrus medica, with large fruits, not acid, and having a high perfume.

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 Cit·ron n.
 1. Bot A fruit resembling a lemon, but larger, and pleasantly aromatic; it is produced by the citron tree (Citrus medica).  The thick rind, when candied, is the citron of commerce.  The fruit was once called the lime.
 2. A citron tree, Citrus medica.
 3. A citron melon.
 Citron melon. (a) A small variety of muskmelon with sugary greenish flesh. (b) A small variety of watermelon, whose solid white flesh is used in making sweetmeats and preserves.
 Citron tree Bot., the tree which bears citrons.  It was probably a native of northern India, and is now understood to be the typical form of Citrus Medica.

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 Citrus medica
      n : thorny evergreen small tree or shrub of India widely
          cultivated for its large lemonlike fruits that have thick
          warty rind [syn: citron, citron tree]