f-stop
noun
ˈef-ˌstäp 
: a camera lens aperture setting indicated by an f-number
Word History
First Known Use
1946, in the meaning defined above
- unrepresentative
- unrepresentativeness
- unrepresentativenesses
- unrepresented
- unrepressed
- unreprieved
- unreproachable
- unreproached
- unreproachful
- unreproaching
- unreproducible
- unreprovable
- unreproved
- unrepugnant
- unrequested
- unrequired
- unrequisite
- unrequitable
- unrequited
- unresectable
- unresembling
- unresented
- unresentful
- unresenting
- unreserve