focal Meaning, Definition & Usage

  1. adjective satellite having or localized centrally at a focus
    • focal point
    • focal infection
  2. adjective of or relating to a focus
    • focal length

WordNet

Fo"cal adjective
Etymology
Cf.F. focal. See Focus.
Definitions
  1. Belonging to,or concerning, a focus; as, a focal point.

Webster 1913