視し準じゅん儀ぎMeanings1nouncollimatorTechnical term used in optics, surveying, and astronomy for a device that aligns light rays or sights.望ぼう遠えん鏡きょうの調ちょう整せいには視し準じゅん儀ぎが使つかわれる。A collimator is used to adjust the telescope.