[per-uh-skohp] 
| 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. |
| per·i·scope (pěr'ĭ-skōp') n. Any of various tubular optical instruments that contain reflecting elements, such as mirrors and prisms, to permit observation from a position displaced from a direct line of sight. per'i·scop'ic (-skŏp'ĭk), per'i·scop'i·cal (-ĭ-kəl) adj. |
əˌskoʊp