| 单词 | etalon |
| 释义 | etalon /ayt"l on'/, n. Optics. an interferometer consisting of two glass plates that reflect approximately half of each ray of light incident upon them and that are separated by a small, fixed distance: used to compare wavelengths and to study atomic spectra. [1900-05; < F; MF estalon standard, deriv. of OF estal place < Gmc; see STALL1] |
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