me·di·um /ˈmidiəm/
 中間,中庸,平均數,介質,媒介;媒體,手段,方法,宣傳工具;
 me·di·um /ˈmɪdɪəm/ 名詞
 介質,介體,中間的,培養基,培養基
 medium
 媒介;媒體;儲存媒體;中等的
 medium
 媒體 中
 Me·di·um n.; pl. L. Media E. Mediums
 1. That which lies in the middle, or between other things; intervening body or quantity. Hence, specifically: (a) Middle place or degree; mean.
    The just medium . . . lies between pride and abjection.   --L'Estrange.
 (b) Math. See Mean. (c) Logic The mean or middle term of a syllogism; that by which the extremes are brought into connection.
 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.
    Whether any other liquors, being made mediums, cause a diversity of sound from water, it may be tried.   --Bacon.
 I must bring together
 All these extremes; and must remove all mediums.   --Denham.
 3. An average. [R.]
    A medium of six years of war, and six years of peace.   --Burke.
 4. A trade name for printing and writing paper of certain sizes. See Paper.
 5. Paint. The liquid vehicle with which dry colors are ground and prepared for application.
 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.
 Me·di·um, a. Having a middle position or degree; mean; intermediate; medial; as, a horse of medium size; a decoction of medium strength.
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 medium
      adj 1: around the middle of a scale of evaluation of physical
             measures; "an orange of average size"; "intermediate
             capacity"; "a plane with intermediate range"; "medium
             bombers" [syn: average, intermediate]
      2: (of meat) cooked until there is just a little pink meat
         inside
      n 1: a means or instrumentality for storing or communicating
           information
      2: the surrounding environment; "fish require an aqueous
         medium"
      3: an intervening substance through which signals can travel as
         a means for communication
      4: (bacteriology) a nutrient substance (solid or liquid) that
         is used to cultivate micro-organisms [syn: culture medium]
      5: an intervening substance through which something is
         achieved; "the dissolving medium is called a solvent"
      6: a liquid with which pigment is mixed by a painter
      7: (biology) a substance in which specimens are preserved or
         displayed
      8: a state that is intermediate between extremes; a middle
         position; "a happy medium"
      9: someone who serves as an intermediary between the living and
         the dead; "he consulted several mediums" [syn: spiritualist]
      10: transmissions that are disseminated widely to the public
          [syn: mass medium]
      11: an occupation for which you are especially well suited; "in
          law he found his true metier" [syn: metier]
      [also: media (pl)]