We found 21 dictionaries that define the word focal plane:

General (9 matching dictionaries)

1. focal plane: Merriam-Webster
2. focal plane: Oxford Learner's Dictionaries
3. focal plane: Collins English Dictionary
4. focal-plane: Wordnik
5. focal plane: Wiktionary
6. focal plane: Infoplease Dictionary
7. focal plane: Dictionary.com
8. Focal Plane, Focal plane: Wikipedia, the Free Encyclopedia
9. focal plane: TheFreeDictionary.com

Art (2 matching dictionaries)

10. focal plane: ArtLex Lexicon of Visual Art Terminology
11. English-Chinese Dictionary of Graphic Communications (Big 5) (No longer online)

Computing (2 matching dictionaries)

12. Webopedia (No longer online)
13. focal plane: Encyclopedia

Medicine (3 matching dictionaries)

14. focal plane: Merriam-Webster Medical Dictionary
15. online medical dictionary (No longer online)
16. focal plane: Medical dictionary

Miscellaneous (1 matching dictionary)

17. Encyclopedia of Graphic Symbols (No longer online)

Science (1 matching dictionary)

18. Focal Plane: Eric Weisstein's World of Physics

Tech (3 matching dictionaries)

19. Focal Plane: Nikonians Photo Glossary
20. PhotoNotes Dictionary of Film and Digital Photography (No longer online)
21. focal plane: Television: Critical Methods and Applications

Definitions from Wiktionary (focal plane) ▸ noun:  (optics) Any plane perpendicular to the axis of a lens or mirror. ▸ noun:  (optics) Such a plane, in a camera, microscope etc, in which the real image is in focus. Similar: focal, focal point, focal depth, optical axis, vertex, virtual focus, optic axis, flat, focus, eyepoint, more... Phrases: focal plane shutter, focal plane array, Conjugate focal plane, more... ▸ Words similar to focal plane ▸ Usage examples for focal plane ▸ Idioms related to focal plane ▸ Wikipedia articles (New!) ▸ Words that often appear near focal plane ▸ Rhymes of focal plane ▸ Invented words related to focal plane