Solarium may refer to: 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.
Noun. 1. cavity wall-a wall formed of two thicknesses of masonry with a space between them. wall-an architectural partition with a height and length greater than its thickness; used to divide or enclose an area or to support another structure; the south wall had a small window; the walls were covered with pictures.
The rhythmical location of cavities leads to a reinforcement of the effect.(4) According to B. N. Rodimov (1976, as cited by Frolov, 2001) the walls of multi cavity structures can be considered as the boundaries of the potential electron's box.