C3O1L1L1I1M3A1T1O1R1
14 points
COLLIMATOR is validvalid
one that collimates [n COLLIMATORS]
a telescope arranged and used to determine errors of collimation, both vertical and horizontal [n -S]
one that collimates [n COLLIMATORS]
a telescope arranged and used to determine errors of collimation, both vertical and horizontal [n -S]