surd
See also: sùrd
English edit
Etymology edit
Borrowed from Latin surdus (“deaf”); in mathematical sense, "deaf to reason", i.e. irrational.
Pronunciation edit
- (Received Pronunciation) enPR: sûd, IPA(key): /sɜːd/
Audio (Southern England) (file)
- (US) enPR: sûrd, IPA(key): /sɝd/
- Rhymes: -ɜː(ɹ)d
Noun edit
surd (plural surds)
- (arithmetic) An irrational number, especially one expressed using the √ symbol.
- (linguistics) A voiceless consonant.
- Antonym: sonant
Derived terms edit
Adjective edit
surd (comparative more surd, superlative most surd)
- (obsolete) Lacking the sense of hearing; deaf.
- 1670s, published 1716, Thomas Browne, Christian Morals, part 3, section 6:
- …how all Words fall to the Ground, spent upon such a surd and Earless Generation of Men, stupid unto all Instruction…
- 1670s, published 1716, Thomas Browne, Christian Morals, part 3, section 6:
- (obsolete) unheard
- 1773, William Kenrick, A New Dictionary of the English Language, section 3, page 5:
- To this errour, of blending the ſurd and vocal modes of articulation together, may be added the too frequent uſe of compound articulations both vocal and ſurd.
- (mathematics) Involving surds, or irrational numbers; not capable of being expressed in rational numbers.
- a surd expression or quantity; a surd number
- (phonetics) unvoiced; voiceless
- Antonym: sonant
Related terms edit
Anagrams edit
Aromanian edit
Alternative forms edit
Etymology edit
From Latin surdus. Compare Romanian surd.
Adjective edit
surd m (feminine surde, plural surdz, feminine plural surdi)
Related terms edit
Romanian edit
Etymology edit
Inherited from Latin surdus, from Proto-Indo-European *swer- (“ringing, whistling”). Compare Aromanian surdu.
Pronunciation edit
Adjective edit
surd m or n (feminine singular surdă, masculine plural surzi, feminine and neuter plural surde)
Declension edit
Declension of surd