noun, noun or participle which takes 'suru', transitive verb
round; circular canon
A musical form where voices enter successively at equal intervals, each singing the same melody. The English term 'trolling' is archaic and rarely used; 'round' or 'circular canon' is standard.
音楽の授業で「かえるの合唱」を輪唱した。
We sang 'Frog's Chorus' as a round in music class.
輪
A round is a form where the same melody is sung at staggered entries.