Definition & Meaning of "hundred twenty-eighth note"in English

What is a "hundred twenty-eighth note"?

A hundred twenty-eighth note is a musical symbol that represents a duration equal to one-hundred twenty-eighth of the length of a whole note. It is depicted as a filled circle with a stem and five flags. This note lasts for one-sixty-fourth of the time of a quarter note, making it one of the shortest note values used in music. Hundred twenty-eighth notes are used to create extremely fast and detailed rhythmic passages, allowing for very rapid sequences of notes.