Mutagen vs Carcinogen Mutagen and carcinogen are two terms that have a lot in common. There is a potential that a single substance could be both of them at the same time and be only one of the two, as well.
A curb bit is a type of bit used for riding horses that uses lever action. It includes the pelham bit and the Weymouth curb along with the traditional curb bit used mainly by Western riders. Kimblewicks or Kimberwickes are modified curb bits, and a curb bit is used in a double bridle along with a bradoon.
Also, British, kerb. a rim, especially of joined stones or concrete, along a street or roadway, forming an edge for a sidewalk. 2. anything that restrains or controls; a restraint; check. 3. an enclosing framework or border. 4. Also called curb bit. a bit used with a bridoon for control of a horse, to which a chain (curb chain) is hooked. 5. Also called curb market; British, kerb market, kerbstone market. a market, originally on the sidewalk or street, for the sale of securities not listed on a stock exchange.