noun
individual medley
A swimming race where one swimmer swims all four strokes in order: butterfly, backstroke, breaststroke, and freestyle.
彼は200メートル個人メドレーで金メダルを取った。
He won the gold medal in the 200-meter individual medley.
A medley relay where four swimmers each swim a different stroke, unlike 個人メドレー where one swimmer does all four.
From 個人 (individual) + メドレー (medley), a direct borrowing and combination used in competitive swimming.