Main Entry:

so·lar·i·um

Pronunciation:

\sō-ˈler-ē-əm, sə-\

Function:

noun

Inflected Form(s):

plural -ia \-ē-ə\ also so·lar·i·ums

Etymology:

Latin, porch exposed to the sun, from sol

Date:

circa 1823

: a glass-enclosed porch or room ; also : a room (as in a hospital) used especially for sunbathing or therapeutic exposure to light