surd

Signification (Anglais)

Noun

1. An irrational number, especially one expressed using the √ symbol.
2. A voiceless consonant.

Adj

1. (obsolete) Lacking the sense of hearing; deaf.
2. (obsolete) unheard
3. Involving surds, or irrational numbers; not capable of being expressed in rational numbers.
4. unvoiced; voiceless

Concepts

sourd

irrationnel

sourde

Opposé de

sonant

Synonymes

voiceless

unvoiced

hard

voiceless consonant

irrational root

irrational

unreflected

irrational number

voiceless sound

surd root

unvoiced consonant

nonresonant

toneless

radical

uninflected

Traductions

irrational

consonant sorda

sorda

stimmlos

irrationale algebraische Zahl

irrationale Wurzel

άφωνο σύμφωνο

ασύμμετρος αριθμός

sordo

irrazionale

surdo

número irracional

sordo

Prononcé comme (IPA)

/sɜːd/

Étymologie (Anglais)

First attested in the mid 16th century from Latin surdus (“deaf, mute”), used in mathematics for “irrational,” reflecting ἄλογος (álogos, “irrational, speechless”) as found in Euclid, apparently transmitted via Arabic جِذْر أَصَمّ (jiḏr ʔaṣamm, “deaf root”). The phonetic sense, “voiceless,” emerged in the 18th century. Doublet of surdo.