姑洗 こせん Meanings Noun (in China) 5th note of the ancient chromatic scale (approx. F sharp) See also: 下無 (しもむ). See also: 十二律 (じゅうにりつ). third lunar month Kanji 姑 mother-in-law. Read as コ. 洗 wash. Read as セン. Jinuma: Japanese Dictionary · Word lists