Definition of "collimation" [col•li•ma•tion]

• The act of collimating or something collimated (noun)
• Aligning lenses along line of sight to minimize aberrations (noun)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "Exposure to ionizing radiation during a medical examination can be limited by lead shielding, tube collimation and using the lowest dose necessary to obtain a diagnostic image."
• "E.g., the formation and collimation of jets is still quite unknown."
• "The replacement is a nice model from Astrosystems, which features four-point collimation adjustment."