Holophane

Holophane [hol-uh-feyn, hoh-luh-] Examples Trademark.

1. a brand of glass having a surface pattern of small, lenslike areas for even diffusion of light.

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