surd Hear it!

surd definition

surd (sʉrd)

adjective

  1. Math. irrational
  2. Phonet. voiceless ()

Etymology: L surdus, deaf, dull, mute: used to transl. Gr alogos, irrational, lit., without reason

noun

  1. Math. an irrational number or quantity; specif., a root which can be expressed only approximately is a surd
  2. Phonet. a voiceless sound

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