Holophane
[ hol-uh-feyn, hoh-luh- ]
/ ˈhɒl əˌfeɪn, ˈhoʊ lə- /
Trademark.
a brand of glass having a surface pattern of small, lenslike areas for even diffusion of light.
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for holophane
This may be made of ground glass, opal glass, or be a dioptric globe such as the holophane.