surdimū′tism, the condition of being deaf and dumb; surd′ity, want of sonant quality.
Of course this gives a number, but this number may be a surd, like √2.
Again, he points out that the surd aspirate h is heard in some languages, but is hardly audible in others.
The rule of surd to surd and sonant to sonant is neglected in most of the factitious specimens of broken English.
For 'voiceless,' 'surd,' 'hard,' or 'tenuis' are sometimes used.
The Sanskrit terms sonant and surd are, in a scientific point of view, the least exceptionable.
On the one hand Aristotle by his doctrine of matter admitted a surd into his system.
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.
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."