Noah Webster
Aplanatic
APLANAT'IC, adjective [Gr. to wander.]
An aplanatic telescope is one which entirely corrects the aberration of the rays of light. It is thus distinguished from the achromatic, which only partially corrects the aberration.
APLANAT'IC, adjective [Gr. to wander.]
An aplanatic telescope is one which entirely corrects the aberration of the rays of light. It is thus distinguished from the achromatic, which only partially corrects the aberration.