1. (n.) An apartment freely exposed to the sun; anciently, an apartment or enclosure on the roof of a house; in modern times, an apartment in a hospital, used as a resort for convalescents.

2. (n.) 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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