# Dictionary Definition

surd adj : of speech sounds [syn: voiceless, unvoiced] [ant: sonant] n : a consonant produced
without sound from the vocal cords [syn: voiceless
consonant]

# User Contributed Dictionary

### Noun

surd (plural surds)- An irrational number, especially one expressed using the √ symbol.
- A voiceless consonant.

# Extensive Definition

Surd may be:

- A voiceless consonant
- An unresolved mathematical expression of an nth root or an irrational number that can be expressed as such a root of a rational number (as opposed to a transcendental number, which cannot)
- Surd, Hungary, a village in Zala county, Hungary
- Surd evil is another term for Natural evil, a type of random and unexplainable evil without meaning
- Jeremiah Surd is a quadriplegic hacker and antagonist from the television series The Real Adventures of Jonny Quest

# Synonyms, Antonyms and Related Words

Gaussian integer, accented, algebraic number,
algorismic, algorithmic, aliquot, allophone, alveolar, apical, apico-alveolar,
apico-dental, articulated, articulation, aspiration, assimilated, assimilation, back, barytone, bilabial, broad, cacuminal, cardinal, cardinal number,
central, cerebral, check, checked, close, complex number, consonant, consonantal, continuant, deaf, deaf and dumb, deaf-eared,
deaf-mute, deafened,
decimal, defective
number, dental, differential, digital, diphthong, dissimilated, dissimilation, dorsal, dull-eared, earless, epenthetic vowel,
even, even number, explosive, exponential, figural, figurate, figurative, finite, finite number, flat, fraction, fractional, front, glide, glossal, glottal, glottalization, guttural, hard, hard of hearing, heavy, high, imaginary, imaginary number,
impair, impossible, infinite, infinity, integer, integral, intonated, irrational, irrational
number, labial, labialization, labiodental, labiovelar, laryngeal, lateral, lax, light, lingual, liquid, logarithmic, logometric, low, manner of articulation,
mid, mixed number, modification, monophthong, monophthongal, morphophoneme, mute, muted, narrow, nasal, nasalized, negative, numeral, numerary, numerative, numeric, occlusive, odd, open, ordinal, oxytone, pair, palatal, palatalized, parasitic
vowel, peak, pharyngeal, pharyngealization,
pharyngealized,
phone, phoneme, phonemic, phonetic, phonic, pitch, pitched, plosive, polygonal number,
positive, possible, posttonic, prime, prime number, prothetic
vowel, pure imaginary, radical, rational, rational number,
real, real number, reciprocal, rectangular
number, retroflex,
round number, rounded,
segmental phoneme, semivowel, serial number,
soft, sonant, sonority, speech sound,
stone-deaf, stop, stopped, stressed, strong, stunned, submultiple, syllabic, syllabic nucleus,
syllabic peak, syllable, tense, thick, thick of hearing, throaty, tonal, tone-deaf, tonic, transcendental,
transcendental number, transfinite number, transition sound,
triphthong, twangy, unaccented, unhearing, unrounded, unstressed, velar, vocable, vocalic, vocoid, voice, voiced, voiced sound, voiceless, voiceless sound,
voicing, vowel, vowellike, weak, whole number, wide, word-deaf