n.
A refractory material consisting of crushed or ground siliceous stone, mixed with fire clay; -- used for lining Bessemer converters; also used for macadamizing roads. →
n.
A grooved instrunent used in performing various operations; -- called also blunt gorget. →
n.
A species of Medicago (M. intertexta), the pods of which are armed with short spines; -- popularly so called. →
n.
Hence, an instrument or means of curbing, restraining, or governing; government; restraint. →