A tubular apparatus containing a system of prisms or mirrors so as to give a viewpoint displaced from the observer's eye by the length of the…
| 单词 | θ64771 |
| 释义 | the world > physical sensation > sight and vision > optical instruments > instrument for distant vision > [noun] > periscope (at sea) > periscope (on land) (5) periscope1899 A tubular apparatus containing a system of prisms or mirrors so as to give a viewpoint displaced from the observer's eye by the length of the… hyposcope1902 a form of periscope for attachment to a rifle or for use as a hand instrument. trenchoscope1915 = trench periscope n. at trench, n. compounds 2. Cf. slightly later trenchscope, n. trench periscope1915 a kind of periscope used in trench warfare to observe enemy lines from inside one's own trenches; cf. trenchoscope, n., trenchscope, n. trenchscope1915 = trench periscope n. at trench, n. compounds 2. Cf. slightly earlier trenchoscope, n. |
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