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surd

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Involving surds, or irrational numbersInvolving surds, or irrational numbers; not capable of being expressed in rational numbers.

UK/sɜːd/US/sɝd/

Значення

значень: 4

Involving surds, or irrational numbers; not capable of being expressed in rational numbers.
a surd expression or quantity; a surd number
Unvoiced; voiceless
(застаріле)Lacking the sense of hearing; deaf.
(застаріле)Unheard

Ще визначення

produced without vibration of the vocal cords

Походження

First attested in the mid 16th century from Latin surdus (“deaf, mute”), used in mathemati

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.

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