focal
Concise Oxford English Dictionary © 2008 Oxford University Press:
focal /ˈfəʊk(ə)l/
▶adjective
- 1 relating to a focus, in particular the focus of a lens.
- 2 (of a disease or medical condition) occurring in one particular site in the body.
– derivatives
focalization (or focalisation) noun,
focalize (or focalise) verb,
focally adverb.
focalization (or focalisation) noun,
focalize (or focalise) verb,
focally adverb.
'focal' also found in these Oxford entries:
bifocal
- dioptre
- f
- f-number
- focal length
- focal plane
- focal point
- focus
- nexus
- radiant
- round
- teleconverter
- telephoto lens
- trifocal
- wide-angle
- zoom lens

