余よ集しゅう合ごうよしゅうごうMeanings1nouncomplementary set; complementrare termmathematicsRare mathematical term for the complement of a set. The more common term is 補集合 (ほしゅうごう).See also: 補集合数すう学がくの文ぶん献けんでは、余よ集しゅう合ごうよりも補ほ集しゅう合ごうのほうがよく使つかわれる。In mathematical literature, 補集合 is used more often than 余集合.