focal

/ˈfoʊkəl/
adjective
  1. Relating to the center or main point of interest or activity.
    • The focal point of the room was a large fireplace.
    • Her speech focused on the focal issues of climate change.
    • The new park became the focal area for community events.
  2. Relating to the point where rays of light meet after passing through a lens or reflecting from a mirror.
    • The focal point of a magnifying glass can start a fire if aimed at the sun.
    • In a telescope, the focal plane is where the image forms.
    • The photographer adjusted the lens to achieve the correct focal length.
Antonyms
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