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solarium

[ suh-lair-ee-uhm, soh- ]
/ səˈlɛər i əm, soʊ- /
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noun, plural so·lar·i·ums, so·lar·i·a [suh-lair-ee-uh, soh-]. /səˈlɛər i ə, soʊ-/.

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.

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Origin of solarium

1815–25; <Latin sōlārium balcony, terrace, equivalent to sōl the sun + -ārium-ary
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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British Dictionary definitions for solarium

solarium
/ (səʊˈlɛərɪəm) /

noun plural -lariums or -laria (-ˈlɛərɪə)

a room built largely of glass to afford exposure to the sun
a bed equipped with ultraviolet lights used for acquiring an artificial suntan
an establishment offering such facilities

Word Origin for solarium

C19: from Latin: a terrace, from sōl sun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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