periscopic
/ˌperɪˈskɒpɪk/adjective
1- of or relating to a periscope（与）潜望镜（有关）的。
1.1
- (of a lens or an optical instrument) giving a wide field of view（镜头, 光学仪器）广角的：
a periscopic sextant.
广角六分仪。
派生词