A metal chain or a set of rings attached to a bar that can be fitted over the fingers to increase the impact of a blow with the fist. a set of connected metal rings worn over a person's fingers, used as a weapon British Equivalent: knuckleduster
[Slang], lumpy protrusions on the edges, and sometimes the underside, of a thunderstorm anvil They usually appear on the upwind side of a back-sheared anvil, and indicate rapid expansion of the anvil due to the presence of a very strong updraft They are not mammatus clouds See also cumuliform anvil, anvil rollover
Lumpy protrusions on the edges, and sometimes the underside, of a thunderstorm anvil They usually appear on the upwind side of a back-sheared anvil, and indicate rapid expansion of the anvil due to the presence of a very strong updraft They are not mammatus clouds