"Collimator" validity in different word game dictionaries

Dictionary Validity
Scrabble US(US/Canada/Thailand - TWL/NWL) Yes
Scrabble UK(International - SOWPODS/CSW) Yes
Words with Friends(WWF) Yes

"collimator" Definition

  1. a device for producing a beam of parallel rays (as of light) or for forming an infinitely distant virtual image that can be viewed without parallax
  2. a device for obtaining a beam (as of particles) of limited cross section

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