单词 | surd |
释义 | surd/səːd /adjective 1 Mathematics (Of a number) irrational. 2 Phonetics (Of a speech sound) uttered with the breath and not the voice (e.g. f, k, p, s, t). noun 1 Mathematics A surd number, especially the irrational root of an integer.They were learning about surds in maths, supposedly one of the hardest subjects....
2 Phonetics A surd consonant. OriginMid 16th century: from Latin surdus 'deaf, mute'; as a mathematical term, translating Greek (Euclid) alogos 'irrational, speechless', apparently via Arabic jiḏr aṣamm, literally 'deaf root'. sense 2 of the adjective dates from the mid 18th century. |
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