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Tinker's dam. A tinker's dam is a temporary patch to repair a hole in a metal vessel such as a pot or a pan. It was used by tinkers and was usually made of mud or clay, or sometimes other materials at hand, such as wet paper. The material was built up around the outside of the hole, so as to plug it.
North American beaver (Castor canadensis), one of two species of beaver that build dams. Beaver dams are dams built by beavers to provide ponds as protection against predators such as coyotes, wolves, and bears, and to provide easy access to food during winter.orth American beaver (Castor canadensis), one of two species of beaver that build dams. Beaver dams are dams built by beavers to provide ponds as protection against predators such as coyotes, wolves, and bears, and to provide easy access to food during winter.