mid /ˈmɪd/
  (a.)中間的,中央的,中部的在…之中
  Mid, n. Middle. [Obs.]
     About the mid of night come to my tent.   --Shak.
  Mid a. [Compar. wanting; superl. Midmost.]
  1. Denoting the middle part; as, in mid ocean.
  No more the mounting larks, while Daphne sings,
  Shall list'ning in mid air suspend their wings.   --Pope.
  2. Occupying a middle position; middle; as, the mid finger; the mid hour of night.
  3. Phon. Made with a somewhat elevated position of some certain part of the tongue, in relation to the palate; midway between the high and the low; -- said of certain vowel sounds; as, ā (āle), ĕ (ĕll), ō (ōld). See Guide to Pronunciation, §§ 10, 11.
  Note: ☞ Mid is much used as a prefix, or combining form, denoting the middle or middle part of a thing; as, mid-air, mid-channel, mid-age, midday, midland, etc. Also, specifically, in geometry, to denote a circle inscribed in a triangle (a midcircle), or relation to such a circle; as, mid-center, midradius.
  mid
       adj : used in combination to denote the middle; "midmorning";
             "midsummer"; "in mid-1958"; "a mid-June wedding" [syn:
             mid(a)]