(on a steam engine) a valve mechanism oscillating through an arc to open and close.
noun 1. a port in NW Illinois, on the Mississippi: government arsenal.
noun 1. any of several alpine plants belonging to the genus Androsace, of the primrose family, having tufted leaves often in basal rosettes, and umbels of pink, red, purple, or white flowers.
noun, Slang. 1. a mountaineering enthusiast. noun a rock-and-roll disk jockey Usage Note music rock jock
noun 1. a city in SE Massachusetts.