• adjective
• synonym
• antonym

• focal distance (noun)
  1. the distance from a lens to its focus
• focal epilepsy (noun)
  1. as a twitching of a limb or an illusory sensation or a mental disturbance epilepsy in which the attacks begins with an isolated disturbance of cerebral function
• focal infection (noun)
  1. bacterial infection limited to a specific organ or region especially one causing symptoms elsewhere
• focal length (noun)
  1. the distance between the centre of a lens and the focal point
• focal point (noun)
  1. the person or thing that you pay most attention to
  2. technical the point at which beams of light meet after they have been through a LENS
• focal ratio (noun)
  1. camera the ratio of the focal length to the diameter of a lens system
• focal seizure (noun)
  1. transitory disturbance in motor or sensory function resulting from abnormal cortical activity
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