circle of least confusion
noun Optics.
the smallest cross section in a beam of paraxial rays, lying in the plane of least spherical aberration.
Nearby words
circle jerk, circle of confusion, circle of convergence, circle of curvature, circle of declination, circle of least confusion, circle of willis, circle time, circle-in, circle-out, circlet
Origin of circle of least confusion
First recorded in 1865–70
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019