Top definition. matrix. a term describing a controlled environment or situation in which people act or behave in ways that conform to roles pre-determined by a powerful person(s) who decides how the world is supposed to function.
Akathisia is a movement disorder characterized by a feeling of inner restlessness and a compelling need to be in constant motion, as well as by actions such as rocking while standing or sitting, lifting the feet as if marching on the spot, and crossing and uncrossing the legs while sitting.
Enstatite is a common member of the pyroxene family, and can be found in gabbro and mafic diorites. Pyroxenite, an igneous rock composed totally of pyroxene minerals, is related to ultramafic terrains and is therefore relatively rare at the surface of the earth's crust. Amphibole: mostly black, forms long, slender crystals with 2 cleavages at 60Â° and 120Â°.