Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

EXAMPLES FROM THE WEB FOR SURD

Of course this gives a number, but this number may be a surd, like √2.

For 'voiceless,' 'surd,' 'hard,' or 'tenuis' are sometimes used.

On the one hand Aristotle by his doctrine of matter admitted a surd into his system.

The rule of surd to surd and sonant to sonant is neglected in most of the factitious specimens of broken English.

The Sanskrit terms sonant and surd are, in a scientific point of view, the least exceptionable.

Again, he points out that the surd aspirate h is heard in some languages, but is hardly audible in others.

Surdimū′tism, the condition of being deaf and dumb; Surd′ity, want of sonant quality.

The terms sonant and surd are, in a scientific point of view, the least exceptionable.

The problems have a surd or irrational element in them; and to solve them would be to bring reason into collision with itself.

WORD ORIGIN

1550s, "irrational" (of numbers), from Latin surdus "unheard, silent, dull," possibly related to susurrus "a muttering, whispering" (see susurration). The mathematical sense is from the use of Latin surdus to translate Arabic (jadhr) asamm "deaf (root)," itself a loan-translation of Greek alogos, literally "speechless, without reason" (Euclid book x, Def.). In French, sourd remains the principal word for "deaf."

MORE RELATED WORDS FOR SURD

voiceless

adjectiveinaudible
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.