n the inner branch of the common iliac artery on either side of the body; divides into several branches that supply blood to the pelvic and gluteal areas
n a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine
n an accounting procedure or system designed to promote efficiency or assure the implementation of a policy or safeguard assets or avoid fraud and error etc.