• WordNet 3.6
    • n solarium a room enclosed largely with glass and affording exposure to the sun
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Webster's Revised Unabridged Dictionary
    • Solarium An apartment freely exposed to the sun; anciently, an apartment or inclosure on the roof of a house; in modern times, an apartment in a hospital, used as a resort for convalescents.
    • Solarium (Zoöl) Any one of several species of handsome marine spiral shells of the genus Solarium and allied genera. The shell is conical, and usually has a large, deep umbilicus exposing the upper whorls. Called also perspective shell.
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Century Dictionary and Cyclopedia
    • n solarium A sundial, fixed or portable. See dial, poke-dial, ring-dial, sun-dial.
    • n solarium A place arranged to receive the sun's rays, usually a flat house-top, terrace; or open gallery, formerly used for pleasure only, but in modern times commonly as an adjunct of a hospital or sanatorium, in which case it is inclosed with glass; a room arranged with a view to giving patients sun-baths.
    • n solarium The typical genus of Solariidæ, containing the staircase-shells, as the perspective shell, S. perspectivum. They have a much depressed but regularly conic shell, angular at the periphery, and with a wide spiral umbilicus which has suggested the idea of a spiral stairway.
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Chambers's Twentieth Century Dictionary
    • Solarium a sun-dial: a place suited to receive the sun's rays—in a hospital or sanatorium
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Webster's Revised Unabridged Dictionary
L. See Solar (n.)
Chambers's Twentieth Century Dictionary
L. sol, the sun, solaris, pertaining to the sun.


In literature:

Solarium, opium lupiadeps, lacr.
"The Anatomy of Melancholy" by Democritus Junior
SOLARIUM, C.I.L., XIV, 3323.
"A Study Of The Topography And Municipal History Of Praeneste" by Ralph Van Deman Magoffin
A "solarium" is erected on this roof, to contain a tropical garden or to be used for dancing.
"The American Architect and Building News, Vol. 27, No. 733, January 11, 1890" by Various
As for how I entered the house, I leaped upon the porch and opened a door of the solarium.
"Murder at Bridge" by Anne Austin
I learned that in the health-lift and the blue-glass solarium.
"The Faith Doctor" by Edward Eggleston
Or the sun itself may cool, so that the last of our race will stand huddled together in a solarium somewhere on the Equator.
"The Prairie Child" by Arthur Stringer
Now get the President out of that solarium and tell me when the coast is clear.
"Astounding Stories of Super-Science April 1930" by Various
Above all, in a literal and also commendatory sense of the word, was the solarium.
"Roman Women" by Alfred Brittain
Since he slept under the sky, his sleeping-room was also a solarium.
"She Buildeth Her House" by Will Comfort

In news:

And sure enough, midway through a cool, sunny morning in the foothills, a seated older woman raises and lowers her arms in the convent 's solarium while a volunteer cheerfully issues instructions.
SKY TONES The solarium of the duplex penthouse at 50 Central Park South opens onto a terrace overlooking the park.
Daily hours are 7 am to 7 pm Oct 27 through Nov 3, 2012, in the John W Jones Reading Solarium of the library.
The administrator at the Mount Vernon home says the solarium will add dining room space and have other benefits for the home's residents, including adding more natural light.
Lilly Sacco, owner of Villa Roma in Harvey's Lake, stands in the restaurant's solarium dining area.