collimation Meaning, Definition & Usage

  1. noun the accurate adjustment of the line of sight of a telescope

WordNet

Col`li*ma"tion noun
Etymology
Cf. F. collimation, fr. a false reading (collimare) for L. collineare to direct in a straight line; col- + linea line. Cf. Collineation.
Definitions
  1. The act of collimating; the adjustment of the line of the sights, as the axial line of the telescope of an instrument, into its proper position relative to the other parts of the instrument.

Webster 1913