opticalWiktionary 原文中文来自 ECDICTadj.眼睛的，视觉的，光学的构词拆分optic词根/词干+-al后缀Of or pertaining to. Adjectival suffix appended to various words, often nouns, to produce an adjective form. Often added to words of Latin origin, but used with other words also. · Forming nouns, especially of verbal action.词源说明From optic + -al.释义（英文）形容词 AdjectiveOf or relating to sight; visual.Designed to assist or enhance sightOf or relating to optics.Of or relating to visible light.Incorporating light-sensitive devices.名词 Noun(film