Thesaurus: focal
Belonging to,or concerning, a focus; as, a focal point.
Related headwords
focusdefinitiondistancedefinitionlensdefinitionmirrordefinitionbelongingdefinitionconcerningdefinitionobjectdefinitionpointdefinitioncenterdefinitioncentrallydefinitionexactlydefinitionimagedefinitionlengthdefinitionlocalizeddefinitionoptdefinitionopticaldefinitionrelatingdefinitionsurfacedefinitioncasedefinitionglassdefinitiontelescopedefinitionfocal distancefamilyfocal epilepsyfamilyfocal infectionfamilyfocal lengthfamilyfocal pointfamilyfocal ratiofamilyfocal seizurefamily
Definitions
- a. Belonging to,or concerning, a focus; as, a focal point.
- adj. having or localized centrally at a focus
- adj. of or relating to a focus
- Belonging to,or concerning, a focus; as, a focal point. Focal distance, or length,of a lens or mirror (Opt.), the distance of the focus from the surface of the lens or mirror, or more exactly, in the case of a lens, from its optical center. --Focal distance of a telescope, the distance of the image of an object from the object glass.
- Belonging to,or concerning, a focus; as, a focal point. Focaldistance, or length,of a lens or mirror (Opt.), the distance of thefocus from the surface of the lens or mirror, or more exactly, in thecase of a lens, from its optical center. --Focal distance of atelescope, the distance of the image of an object from the objectglass.
- j:100 s. having or localized centrally at a focus a. of or relating to a focus