adjective Optics.

free from spherical aberration and coma.

Origin of aplanatic

1785–95; a-6 + Greek planá(ein) to wander + -tic. See planet
Related formsap·la·nat·i·cal·ly, adverb
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Examples from the Web for aplanatic

Historical Examples of aplanatic

British Dictionary definitions for aplanatic



(of a lens or mirror) free from spherical aberration
Derived Formsaplanatically, adverb

Word Origin for aplanatic

C18: from Greek aplanētos prevented from wandering, from a- 1 + planētos, from planaein to wander
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

Medicine definitions for aplanatic




Of or relating to an optical lens that is free from chromatic or spherical aberration.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.