a plane through a crystal that divides the crystal into two halves that are mirror images of each other.
Talk Like A Sailor: 9 Fascinating Nautical TermsIn sailing, a moonraker is a light square sail set at the top of the mast. But this term is also a demonym for people from Wiltshire, England.
Compare symmetry element.
Origin of reflection plane
First recorded in 1970–75
Also called symmetry plane.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019