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1. Oxford Dictionary

   surd

   • IPA[səːd]

   英式

   • adj.
     (of a number) irrational.；(of a speech sound) uttered with the breath and not the voice (e.g. f, k, p, s, t).
   • n.
     a surd number, especially the irrational root of an integer.；a surd consonant.

   • noun: surd, plural noun: surds

2. • 釋義

   adj.

   形容詞

   • 1. (of a number) irrational.
   • 2. (of a speech sound) uttered with the breath and not the voice (e.g. f, k, p, s, t).

   n.

   名詞

   • 1. a surd number, especially the irrational root of an integer.
   • 2. a surd consonant.
3. • 更多解釋

   surd

   • IPA[sərd]

   美式

   • adj.
     (of a number) irrational.
   • n.
     a surd number, especially the irrational root of an integer.

   Oxford American Dictionary