Gastrointestinal: Adjective referring collectively to the stomach and small and large intestines. The commonly used abbreviation for gastrointestinal is GI. (Outside of medicine, GI can also stand for galvanized iron, general issue or government issue-as in GI Joe).
Before the extracellular matrix is calcified, the tissue is called osteoid (bone-like) tissue. When the concentrations of calcium and phosphate ions rise high enough, they are deposited into the extracellular matrix, and the bone calcifies.
1. a benign bony growth projecting outward from a bone surface. 2. osteochondroma .exostotÂ´ic. exostosis cartilagiÂ´nea a variety of osteoma consisting of a layer of cartilage developing beneath the periosteum of a bone. ivory exostosis compact osteoma. multiple exostoses an inherited condition in which multiple cartilaginous or osteocartilaginous excrescences grow out from the cortical surfaces of long bones.