collimation

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col·li·mate

 (kŏl′ə-māt′)
tr.v. col·li·mat·ed, col·li·mat·ing, col·li·mates
1. To make parallel; line up.
2. To adjust the line of sight of (an optical device).

[New Latin collīmāre, collīmāt-, alteration of Latin collīneāre, to aim : com-, intensive pref.; see com- + līneāre, to make straight (from līnea, line; see line1).]

col′li·ma′tion n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.collimation - the accurate adjustment of the line of sight of a telescope
readjustment, adjustment, registration - the act of adjusting something to match a standard