せいさ
せいさ 【性差 】a sex difference ; sexual distinction ; a gender gap .
せいさ 【精査 】名詞 【細心の調査 】a minute [a thorough, a careful ] investigation ; 【細心の検査 】a minute [a thorough, a careful ] examinaiton ; 【精密な調査 [吟味 ]】scrutiny .精査する 動詞 ▸ 事故の原因を精査する make a minute [thorough ] investigation of the cause of the accident / investigate the cause of the accident minutely [thoroughly ].