Usually means: Point where parallel rays converge.
Definitions Related words Mentions
We found 9 dictionaries that define the word principal focus:

General (7 matching dictionaries)
  1. principal focus: Merriam-Webster
  2. principal focus: American Heritage Dictionary of the English Language
  3. principal focus: Collins English Dictionary
  4. principal focus: Wordnik
  5. principal focus: Dictionary.com
  6. principal focus: FreeDictionary.org
  7. principal focus: TheFreeDictionary.com

Computing (1 matching dictionary)
  1. principal focus: Encyclopedia

Medicine (1 matching dictionary)
  1. online medical dictionary (No longer online)



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