Holophane

[hol-uh-feyn, hoh-luh-]

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. 2018

Examples from the Web for holophane

Historical Examples of holophane

This may be made of ground glass, opal glass, or be a dioptric globe such as the holophane.
Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 6
Various