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.
coelom. (sÄ`lÉm) , fluid-filled body cavity, found in animals, which is lined by cells derived from mesoderm mesoderm,in biology, middle layer of tissue formed in the gastrula stage of the developing embryo.At the end of the blastula stage, cells of the embryo are arranged in the form of a hollow ball......also body cavity), the space between the body wall and the internal organs in higher multicellular animals. The coelom is enclosed by its own epithelial linings, which are of mesodermal origin.