| 单词 | periscope |
| 释义 | periscope /per"euh skohp'/, n. 1. an optical instrument for viewing objects that are above the level of direct sight or in an otherwise obstructed field of vision, consisting essentially of a tube with an arrangement of prisms or mirrors and, usually, lenses: used esp. in submarines. 2. a periscopic lens. [1815-25; back formation from PERISCOPIC] |
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