• a sharp prod fixed to a rider's heel and used to urge a horse onward
• an anxiety disorder characterized by chronic free-floating anxiety and such symptoms as tension or sweating or trembling or lightheadedness or irritability etc that has lasted for more than six months
• a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material
• the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees)
Note: This list has been curated by our developer and author and fine-tuned since 2016 with manual additions, exclusions and rankings. Thousands of user contributions from rappers, singers, songwriters and poets have also been used for accuracy.