the.com/solarium

a glass room built to trap sunlight before tanning beds made it a science crime

means A room enclosed largely in glass, designed to soak up sunlight, often used for relaxation, recovery, or basking.

from Straight from Latin solarium, meaning 'a place exposed to the sun' — built on sol, 'the sun' (the same root that lights up 'solar' and 'parasol'). In Roman use it could mean a sundial or a flat sunny rooftop terrace, the kind of spot where you'd lie out and let the sun do its work. The word kept its bright literal heart all the way into English.

roman roots
Ancient Roman villas had sun-rooms for prescribed sunbathing
medical past
Tuberculosis wards once used them as cure
word root
From Latin sol, simply meaning sun
ship decks
Ocean liners boasted glass solariums for wealthy passengers
now banned
Tanning solariums outlawed for minors in many countries
for instance

heliodor crystal — golden beryl variety found in vogtland, germany, used in solar healing chambers since 1920s

berne solarium — public sun-bathing facility opened 1930s in berne, switzerland, pioneering open-air health trend

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