| 单词 | ultra-red |
| 释义 | > as lemmasultra-red c. ultra-red, A former name for infra-red adj. and n. (So French ultra-rouge; cf. ultraviolet adj. and n.) ΚΠ 1870 J. Tyndall Heat (ed. 4) xiii. §612. 439 The failure..proved the invisible rays to be exclusively ultra-red. 1875 tr. H. W. Vogel Chem. Light & Photogr. vii. 60 We name the invisible tones of colour above violet ultra-violet, and those beyond red ultra-red. < as lemmas |
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