plural noun Optics.
the pattern of light interference produced by the contact of the convex surface of a lens with a plane glass plate, appearing as a series of concentric, alternately bright and dark rings, which are colored if the light source is white.
What’s The #’s Real Name?A hash has referred to stripes on military jackets since as early as 1910. But, in the 1980s, people started using hash to refer to the # symbol.
Origin of Newton's rings
1825–35; after I. Newton, who discovered them
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019