English
rayproof
From ray + -proof.
Today it means
adj Shielded to prevent the emission of X-rays.
Sources
Sources: Wiktionary, “rayproof”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / rayproof