Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of or relating to optical systems that correct for spherical aberration.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Free from, or corrected for, spherical aberration and chromatic aberration

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having two or more parts of different curvatures, so combined as to remove spherical aberration; -- said of a lens.

from The Century Dictionary and Cyclopedia

  • Without aberration: in optics, applied to a lens or combination of lenses, as in a telescope, which brings parallel rays to a focus without spherical or chromatic aberration.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. free from or corrected for spherical aberration

Etymologies

From a-1 + Greek planāsthai, to wander; see pelə-2 in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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