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.
A coelom is a fluid-filled body cavity that separates the digestive tract and the outer body wall and is completely lined with mesoderm (Simmons 2004). The surfaces of the coelom are covered with a peritoneum, which is a slick epithelial layer (Yeh 2002).