(physics) Synonym of 弦理論 (genriron, “string theory”)

(Shinto) a traditional Japanese paper doll used in certain purification rituals / a doll or other substitute for a person, used as the target for a prayer or curse / a substitute or stand-in for a person

Kyūjitai form of 論理学: logic

Lojban (an artificial language)

(Internet slang) Short for どっちもどっち論.

(2channel slang) Synonym of セックス (sekkusu, “to have sex”)

(2channel slang) Synonym of セックス (sekkusu, “sexual intercourse”)

(programming) boolean data type

Alternative form of ロタウイルス (rotauirusu, “rotavirus”)

Alternative spelling of ルソン (“Luzon; the Philippines”)