aplanatic

[ ap-luh-nat-ik ]
/ ˌæp ləˈnæt ɪk /

adjective Optics.

free from spherical aberration and coma.

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Origin of aplanatic

1785–95; a-6 + Greek planá(ein) to wander + -tic. See planet

OTHER WORDS FROM aplanatic

ap·la·nat·i·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for aplanatic

British Dictionary definitions for aplanatic

aplanatic
/ (ˌæpləˈnætɪk) /

adjective

(of a lens or mirror) free from spherical aberration

Derived forms of aplanatic

aplanatically, 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

Medical definitions for aplanatic

aplanatic
[ ăp′lə-nătĭk ]

adj.

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.