Sentence:  The sensibility of a galvanometer may be varied in a very simple manner by the use of what is termed a <WSD>"shunt</WSD>". A <WSD>shunt</WSD> is a resistance coil, or coil of fine wire used to divert some definite portion of a current, taking it past a galvanometer instead of through its coils. 
Meaning of the word marked with <WSD> tags:  A connection used as an alternative path between parts of an electrical circuit.