Dictionary.com

surd

[ surd ]
/ sɜrd /
Save This Word!

adjective
Phonetics. voiceless (opposed to sonant).
Mathematics. (of a quantity) not capable of being expressed in rational numbers; irrational.
noun
Phonetics. a voiceless consonant (opposed to sonant).
Mathematics. a surd quantity.
QUIZ
ARE YOU A TRUE BLUE CHAMPION OF THESE "BLUE" SYNONYMS?
We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms.
Question 1 of 8
Which of the following words describes “sky blue”?
Meet Grammar CoachWrite or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing
Meet Grammar CoachImprove Your Writing
Write or paste your essay, email, or story into Grammar Coach and get grammar help

Origin of surd

First recorded in 1545–55, surd is from the Latin word surdus dull-sounding, mute, deaf
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use surd in a sentence

British Dictionary definitions for surd

surd
/ (sɜːd) /

noun
maths an expression containing one or more irrational roots of numbers, such as 2√3 + 3√2 + 6
phonetics a voiceless consonant, such as (t)
adjective
of or relating to a surd

Word Origin for surd

C16: from Latin surdus muffled
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
FEEDBACK