surd : Dictionary / Wörterbuch (BEOLINGUS, TU Chemnitz)

English Dictionary: surd	by the DICT Development Group
3 results for surd
From WordNet (r) 3.0 (2006) [wn]:
surd adj produced without vibration of the vocal cords; "unvoiced consonants such as `p' and `k' and `s'" Synonym(s): unvoiced, voiceless, surd, hard Antonym(s): soft, sonant, voiced n a consonant produced without sound from the vocal cords Synonym(s): surd, voiceless consonant
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Surd \Surd\, a. [L. surdus deaf (whence the meaning, deaf to reason, irrational), perhaps akin to E. swart. Cf. {Sordine}.] 1. Net having the sense of hearing; deaf. [Obs.] [bd]A surd . . . generation.[b8] --Sir T. Browne. 2. Unheard. [Obs.] --Kenrick. 3. (Math.) Involving surds; not capable of being expressed in rational numbers; radical; irrational; as, a surd expression or quantity; a surd number. 4. (Phonetics) Uttered, as an element of speech, without tone, or proper vocal sound; voiceless; unintonated; nonvocal; atonic; whispered; aspirated; sharp; hard, as f, p, s, etc.; -- opposed to sonant. See Guide to Pronunciation, [sect][sect]169, 179, 180.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Surd \Surd\, n. (Math.) 1. A quantity which can not be expressed by rational numbers; thus, [fb]2 is a surd. 2. (Phon.) A surd element of speech. See {Surd}, a., 4.