Word.ws English Dictionary

focal planes

focal planes is the plural of focal plane.

Meaning of focal plane

Noun

focal plane (plural focal planes)

  1. Any plane perpendicular to the axis of a lens or mirror.
  2. Such a plane, in a camera, microscope etc, in which the real image is in focus.

Questions about focal planes

What is focal planes the plural of?
Focal planes is the plural of focal plane.

Words near focal planes in the dictionary

  1. focal depth
  2. focal depths
  3. focal length
  4. focal lengths
  5. focal plane
  6. focal planes
  7. focal point
  8. focal points
  9. focalisation
  10. focalisations
  11. focalise

Source and license

Adapted from Wiktionary: focal planes (page history and authors); focal plane (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “focal planes.” Word.ws, https://word.ws/focal_planes. Based on Wiktionary, CC BY-SA 4.0.