老人性痴呆症 ろうじんせいちほうしょう Meanings Noun senile dementia See also: 老人性認知症 (ろうじんせいにんちしょう). Kanji 老 elderly. Read as ロウ. 人 person. Read as ジン. 性 nature. Read as ショウ. 痴 foolish 呆 dumbfounded. Read as ホウ. 症 symptom. Read as ショウ. Word lists Medicine Jinuma: Japanese Dictionary · Word lists