メロディカめろでぃかMeanings1nounmelodicaA free-reed instrument similar to a melodion or keyboard harmonica, often used in music education. Also called 鍵盤ハーモニカ.See also: 鍵盤ハーモニカ小しょう学がく生せいのとき、音おん楽がくの授じゅ業ぎょうでメロディカを吹ふいた。When I was in elementary school, I played the melodica in music class.