solarium
noun
a glass-enclosed room, porch, or the like, exposed to the sun's rays, as at a seaside hotel or for convalescents in a hospital.
The grammatical form denoting more than one person, place, thing, or idea.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
To enjoy this reviving influence, the ancients had terraces on their house-tops called solaria, in which, to use their own expression, they took a solar air-bath.
From Curiosities of Medical Experience by J. G. (John Gideon) Millingen