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Related to surd: pure surd
1. Mathematics An irrational number, such as √2.
2. Linguistics A voiceless sound in speech.
Voiceless, as a sound.
[Medieval Latin surdus, speechless, surd (translation of Arabic (jaḏr) 'aṣamm, deaf (root), surd, translation of Greek alogos, speechless, surd), from Latin.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (Mathematics) maths an expression containing one or more irrational roots of numbers, such as 2√3 + 3√2 + 6
2. (Phonetics & Phonology) phonetics a voiceless consonant, such as (t)
3. (Mathematics) of or relating to a surd
4. (Phonetics & Phonology) of or relating to a surd
[C16: from Latin surdus muffled]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
1. (of a speech sound) voiceless (opposed to sonant).
2. (of a quantity) not capable of being expressed in rational numbers; irrational.n.
3. a voiceless consonant.
4. a surd quantity.
[1545–55; < Latin surdus muted, literally, deaf]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||surd - a consonant produced without sound from the vocal cords|
consonant - a speech sound that is not a vowel
|Adj.||1.||surd - produced without vibration of the vocal cords; "unvoiced consonants such as `p' and `k' and `s'"|
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