F-stop Definition
ĕfstŏp
noun
Any of the calibrated settings for an f-number.
Webster's New World
Alternative spelling of f-stop.
Wiktionary
Other Word Forms of F-stop
Noun
Singular:
f-stop
Plural:
f stopsOrigin of F-stop
f(ocal length) stop
From American Heritage Dictionary of the English Language, 5th Edition