[1] : The Collaborative International Dictionary of English v.0.48

aberration \ab`erra"tion\, n. l. aberratio: cf. f. aberration.
   see aberrate.
   1. the act of wandering; deviation, especially from truth or
      moral rectitude, from the natural state, or from a type.
      "the aberration of youth." --hall. "aberrations from
      theory." --burke.
      1913 webster

   2. a partial alienation of reason. "occasional aberrations of
      intellect." --lingard.
      1913 webster

            whims, which at first are the aberrations of a
            single brain, pass with heat into epidemic form.
                                                  --i. taylor.
      1913 webster

   3. astron. a small periodical change of position in the
      stars and other heavenly bodies, due to the combined
      effect of the motion of light and the motion of the
      observer; called annual aberration, when the observer's
      motion is that of the earth in its orbit, and daily or
      diurnal aberration, when of the earth on its axis;
      amounting when greatest, in the former case, to 20.4'',
      and in the latter, to 0.3''. planetary aberration is
      that due to the motion of light and the motion of the
      planet relative to the earth.
      1913 webster

   4. opt. the convergence to different foci, by a lens or
      mirror, of rays of light emanating from one and the same
      point, or the deviation of such rays from a single focus;
      called spherical aberration, when due to the spherical
      form of the lens or mirror, such form giving different
      foci for central and marginal rays; and chromatic
      aberration, when due to different refrangibilities of the
      colored rays of the spectrum, those of each color having a
      distinct focus.
      1913 webster

   5. physiol. the passage of blood or other fluid into parts
      not appropriate for it.
      1913 webster

   6. law the producing of an unintended effect by the
      glancing of an instrument, as when a shot intended for a
      glances and strikes b.
      1913 webster

   syn: insanity; lunacy; madness; derangement; alienation;
        mania; dementia; hallucination; illusion; delusion. see
        insanity.
        1913 webster
see also:
aberrate annual aberration diurnal aberration planetary aberration spherical aberration chromatic aberration 
insanity 

[2] : WordNet (r) 2.0

spherical aberration
     n : a optical aberration resulting in a distorted image

Aberration >> A Words
Aberration, definition of term: Aberration
aberration_pag1.html

Spherical >> S Words
Spherical, definition of term: Spherical
spherical_pag1.html

Spherical Secto >> S Words
Spherical Secto, definition of term: Spherical Secto
spherical+secto_pag1.html

Spherical Coord >> S Words
Spherical Coord, definition of term: Spherical Coord
spherical+coord_pag1.html