Colimator or Collimator: How To spell?
The word Colimator is misspelled against Collimator, a noun meaning "A telescope arranged and used to determine errors of collimation, both vertical and horizontal."
Collimator has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings co & imator which should not be misspelled with single 'L'
Wrong Spelling:  co-l-imator  Correct Spelling:  co-ll-imator 
Find more incorrect spellings of Collimator to spell right way.