Found 2 items, similar to Surd.
English → English (WordNet) Definition: surd surd adj : of speech sounds [syn: voiceless, unvoiced] [ant: sonant] n : a consonant produced without sound from the vocal cords [syn: voiceless consonant]
English → English (gcide) Definition: Surd Surd \Surd\, n. (Math.) 1. A quantity which can not be expressed by rational numbers; thus, [root]2 is a surd. [1913 Webster] 2. (Phon.) A surd element of speech. See Surd, a., 4. [1913 Webster] 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.] “A surd . . . generation.” --Sir T. Browne. [1913 Webster] 2. Unheard. [Obs.] --Kenrick. [1913 Webster] 3. (Math.) Involving surds; not capable of being expressed in rational numbers; radical; irrational; as, a surd expression or quantity; a surd number. [1913 Webster] 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. [1913 Webster]