英语词汇“polyzonal”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	polyzonal
释义	polyzonal, a.\|pɒlɪˈzəʊnəl\| [f. poly- + zonal.] Applied to a form of lens invented by Brewster, composed of a number of annular segments or zones; chiefly used in lighthouses. 1831Brewster Optics xxxviii. 323 Those compound lenses, to which I have given the name of polyzonal lenses.1863Tyndall Heat xvii. 504 With a large polyzonal lens, Melloni converged an image of the moon upon his pile.c1865J. Wylde in Circ. Sc. I. 258/2 A polyzonal lens, such as was employed..at the South Foreland lighthouse.
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