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[kol-uh-meyt] /ˈkɒl əˌmeɪt/
verb (used with object), collimated, collimating.
to bring into line; make parallel.
to adjust accurately the line of sight of (a telescope).
Origin of collimate
1615-25; < Latin collimātus, misreading of collineātus, past participle of collineāre to direct in a straight line, equivalent to col- col-1 + -lineā-, verbal derivative of linea line1 + -tus past participle suffix
Related forms
collimation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for collimation


verb (transitive)
to adjust the line of sight of (an optical instrument)
to use a collimator on (a beam of radiation or particles)
to make parallel or bring into line
Derived Forms
collimation, noun
Word Origin
C17: from New Latin collimāre, erroneously for Latin collīneāre to aim, from com- (intensive) + līneāre, from līnea line
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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collimation in Medicine

collimation col·li·ma·tion (kŏl'ə-mā'shən)

  1. The process of restricting and confining an x-ray beam to a given area.

  2. In nuclear medicine, the process of restricting the detection of emitted radiations to a given area of interest.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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