Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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connecting rod a rod that links a rotating part of a machine to a reciprocating part, such as a crankshaft to a piston.
control rod a rod or bar in a nuclear reactor that contains a neutron-absorbing material, and that is lowered into or raised from the core to control the fission chain reaction.
divining rod a forked stick used by dowsers to search for underground water; dowsing rod.
fishing rod a long thin pole with a line, hook, and often a reel that is used for catching fish.
fuel rod a rod-shaped unit that contains nuclear fuel such as plutonium or uranium.
hot rod (informal) an automobile, often old, that has been radically modified, usu. for greater speed.
leveling rod a graduated rod used in surveying to measure differences in elevation between two points.
lightning rod a grounded metal rod placed high on a building to divert lightning by providing a path for it into the ground.
piston rod a rod connected to a piston that transfers its motion to another engine part.
tie rod an iron rod that acts as a structural connector in a building to counteract tensile stress. [2 definitions]