Origin of surd
Examples from the Web for surd
On the one hand Aristotle by his doctrine of matter admitted a surd into his system.
Surdimū′tism, the condition of being deaf and dumb; Surd′ity, want of sonant quality.
The problems have a surd or irrational element in them; and to solve them would be to bring reason into collision with itself.
The terms sonant and surd are, in a scientific point of view, the least exceptionable.A Handbook of the English Language|Robert Gordon Latham
Again, he points out that the surd aspirate h is heard in some languages, but is hardly audible in others.All About Coffee|William H. Ukers
British Dictionary definitions for surd
Word Origin for surd
Word Origin and History for surd
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."