Solarium

Solarium may refer to:
 * A sunroom, a room built largely of glass to afford exposure to the sun
 * A terrace (building) or flat housetop
 * The Solarium Augusti, a monumental meridian line (or perhaps a sundial) erected in Rome by Emperor Augustus
 * A tanning bed or tanning booth, non-medical devices that emit ultraviolet light for the purpose of creating a cosmetic tanning of the skin
 * Solarium (constellation), a former constellation
 * Solarium (myrmecology), an earthen structure constructed by certain ants for the purpose of brood incubation
 * Solarium, a PHP client for interacting with Apache Solr
 * Project Solarium, an Eisenhower administration initiative to analyze policy towards the Soviet Union
 * Cyberspace Solarium Commission, which works to establish policy solutions to prevent and prepare against cyber attacks.