quarter note

US /ˈkwɔːr.t̬ɚ ˌnoʊt/
UK /ˈkwɔːr.t̬ɚ ˌnoʊt/
"quarter note" picture
1.

a musical note with a duration of one quarter of a whole note, represented by a filled-in oval note head and a stem without a flag

:
In 4/4 time, a quarter note receives one beat.
The melody was composed primarily of quarter notes and eighth notes.