What does "quarter-hour" mean?

quarter of an hour; period of time equal to 15 minutes; a quarter.

What is a synonym for "quarter-hour"?

Common synonyms include: 15 minutes, fifteen.

noun

noun ·Rare ·Advanced level

Noun

1
quarter of an hour; period of time equal to 15 minutes; a quarter.
"These bells chime on the quarter-hour."
2
a quarter of an hour wordnet

"These bells chime on the quarter-hour."

From quarter + hour.