diametrical
 (a.)直徑的;正好相反的
 Di·am·e·tric Di·am·e·tric·al a.
 1. Of or pertaining to a diameter.
 2. As remote as possible, as if at the opposite end of a diameter; directly adverse.
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 diametrical
      adj 1: related to or along a diameter; "the diametral plane" [syn:
             diametral, diametric]
      2: characterized by opposite extremes; completely opposed; "in
         diametric contradiction to his claims"; "diametrical (or
         opposite) points of view"; "opposite meanings"; "extreme
         and indefensible polar positions" [syn: diametric, opposite,
          polar]