surd
a. 荒谬的, 无理数的, 不尽根的, 清音的 n. 无理数, 不尽根数, 清音
发音
词形变化
释义与例句
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1.
An irrational number, especially one expressed using the √ symbol.
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2.
A voiceless consonant.
语言学
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1.
Lacking the sense of hearing; deaf.
废旧…how all Words fall to the Ground, spent upon such a surd and Earless Generation of Men, stupid unto all Instruction…
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2.
unheard
废旧 -
3.
Involving surds, or irrational numbers; not capable of being expressed in rational numbers.
数学a surd expression or quantity; a surd number
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4.
unvoiced; voiceless
语言学
词汇关系
相关短语
词源
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.
来源：wiktionary