crotch·et
noun/ˈkrɒtʃɪt/
/ˈkrɑːtʃɪt/
(British English) (North American English quarter note)
(music)- a note that lasts half as long as a minim

enlarge image Topics Musicc2四分音符 Word OriginMiddle English (in the sense ‘hook’): from Old French crochet, diminutive of croc ‘hook’, from Old Norse krókr.