RATCHET n.
Ratchet drill, a portable machine for working a drill by hand, consisting of a hand lever carrying at one end a drill holder which is revolved by means of a ratchet wheel and pawl, by swinging the lever back and forth. -- Ratchet wheel (Mach.), a circular wheel having teeth, usually angular, with which a reciprocating…
SCAVENGER n.
A person whose employment is to clean the streets of a city, by scraping or sweeping, and carrying off the fifth. The name is also applied to any animal which devours refuse, carrion, or anything injurious to health. Scavenger beetle (Zoöl.), any beetle which feeds on decaying substances, as the carrion beetle. -- Sca…