逆ぎゃっ光こう線せんalso: ぎゃくこうせんぎゃっこうせんMeanings1nounbacklight; illumination from behindRefers to light coming from behind the subject, especially in photography or visual descriptions. The cross-reference 逆光 is a more common synonym.See also: 逆光逆ぎゃっ光こう線せんで写しゃ真しんを撮と