Solarium
Pronunciation : So*la"ri*um
Part of Speech : n.;
Etymology : [L. See Solar, n.]
Definition : 1. 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.
2. (Zo?l.)
Defn: 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.
pl. Solaria.
Source : Webster's Unabridged Dictionary, 1913