| elbow [`el´bō] ANATOMY The arm joint formed at the junction of the humerus, radius, and ulna. DESIGN ENGINEERING 1. A fitting that connects two pipes at an angle, often of 90°. 2. A sharp corner in a pipe. ELECTROMAGNETISM In a waveguide, a bend of comparatively short radius, normally 90°, and sometimes for acute angles down to 15°. GEOGRAPHY A sharp change in direction of a coast line, channel, bank, or so on. |