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3 definitions found
 for culture medium
From The Collaborative International Dictionary of English v.0.48 :

  Medium \Me"di*um\, n.; pl. L. Media, E. Mediums. [L.
     medium the middle, fr. medius middle. See Mid, and cf.
     Medius.]
     1. That which lies in the middle, or between other things;
        intervening body or quantity. Hence, specifically:
        (a) Middle place or degree; mean.
            [1913 Webster]
  
                  The just medium . . . lies between pride and
                  abjection.                        --L'Estrange.
            [1913 Webster]
        (b) (Math.) See Mean.
        (c) (Logic) The mean or middle term of a syllogism; that
            by which the extremes are brought into connection.
            [1913 Webster]
  
     2. A substance through which an effect is transmitted from
        one thing to another; as, air is the common medium of
        sound. Hence: The condition upon which any event or action
        occurs; necessary means of motion or action; that through
        or by which anything is accomplished, conveyed, or carried
        on; specifically, in animal magnetism, spiritualism, etc.,
        a person through whom the action of another being is said
        to be manifested and transmitted.
        [1913 Webster]
  
              Whether any other liquors, being made mediums, cause
              a diversity of sound from water, it may be tried.
                                                    --Bacon.
        [1913 Webster]
  
              I must bring together
              All these extremes; and must remove all mediums.
                                                    --Denham.
        [1913 Webster]
  
     3. An average. [R.]
        [1913 Webster]
  
              A medium of six years of war, and six years of
              peace.                                --Burke.
        [1913 Webster]
  
     4. A trade name for printing and writing paper of certain
        sizes. See Paper.
        [1913 Webster]
  
     5. (Paint.) The liquid vehicle with which dry colors are
        ground and prepared for application.
        [1913 Webster]
  
     6. (Microbiology) A source of nutrients in which a
        microorganism is placed to permit its growth, cause it to
        produce substances, or observe its activity under defined
        conditions; also called culture medium or growth
        medium. The medium is usually a solution of nutrients in
        water, or a similar solution solidified with gelatin or
        agar.
        [PJC]
  
     7. A means of transmission of news, advertising, or other
        messages from an information source to the public, also
        called a news medium, such as a newspaper or radio; used
        mostly in the plural form, i. e. news media or media.
        See 1st media[2].
        [PJC]
  
     Circulating medium, a current medium of exchange, whether
        coin, bank notes, or government notes.
  
     Ethereal medium (Physics), the ether.
  
     Medium of exchange, that which is used for effecting an
        exchange of commodities -- money or current
        representatives of money.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Culture \Cul"ture\ (k?l"t?r; 135), n. [F. culture, L. cultura,
     fr. colere to till, cultivate; of uncertain origin. Cf.
     Colony.]
     1. The act or practice of cultivating, or of preparing the
        earth for seed and raising crops by tillage; as, the
        culture of the soil.
        [1913 Webster]
  
     2. The act of, or any labor or means employed for, training,
        disciplining, or refining the moral and intellectual
        nature of man; as, the culture of the mind.
        [1913 Webster]
  
              If vain our toil
              We ought to blame the culture, not the soil. --Pepe.
        [1913 Webster]
  
     3. The state of being cultivated; result of cultivation;
        physical improvement; enlightenment and discipline
        acquired by mental and moral training; civilization;
        refinement in manners and taste.
        [1913 Webster]
  
              What the Greeks expressed by their paidei`a, the
              Romans by their humanitas, we less happily try to
              express by the more artificial word culture. --J. C.
                                                    Shairp.
        [1913 Webster]
  
              The list of all the items of the general life of a
              people represents that whole which we call its
              culture.                              --Tylor.
        [1913 Webster]
  
     4. (Biol.)
        (a) The cultivation of bacteria or other organisms (such
            as fungi or eukaryotic cells from mulitcellular
            organisms) in artificial media or under artificial
            conditions.
        (b) The collection of organisms resulting from such a
            cultivation.
  
     Note: The growth of cells obtained from multicellular animals
           or plants in artificial media is called tissue
           culture.
           [Webster 1913 Suppl. +PJC]
  
     Note: The word is used adjectively with the above senses in
           many phrases, such as: culture medium, any one of the
           various mixtures of gelatin, meat extracts, etc., in
           which organisms cultivated; culture flask, culture
           oven, culture tube, gelatin culture, plate culture,
           etc.
           [Webster 1913 Suppl.]
  
     5. (Cartography) Those details of a map, collectively, which
        do not represent natural features of the area delineated,
        as names and the symbols for towns, roads, houses,
        bridges, meridians, and parallels.
        [Webster 1913 Suppl.]
  
     Culture fluid, Culture medium a fluid in which
        microscopic organisms are made to develop, either for
        purposes of study or as a means of modifying their
        virulence. If the fluid is gelled by, for example, the use
        of agar, it then is called, depending on the vessel in
        which the gelled medium is contained, a plate, a slant, or
        a stab.
        [1913 Webster +PJC]

From WordNet (r) 3.0 (2006) :

  culture medium
      n 1: (bacteriology) a nutrient substance (solid or liquid) that
           is used to cultivate micro-organisms [syn: culture
           medium, medium]

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