Surd
WordNet

adjective


(1)   Produced without vibration of the vocal cords
"Unvoiced consonants such as `p' and `k' and `s'"

noun


(2)   A consonant produced without sound from the vocal cords
WiktionaryText

Noun


surd
  1. An irrational number, especially one expressed using the √ symbol.
  2. A voiceless consonant.
 
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