noun Chemistry.
any of several polymers of butylene, used chiefly in the manufacture of lubricants and synthetic rubber.
Also, polybutene [pol-ee-byoo-teen] .

poly- + butylene

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
The closed loop system uses a loop of heat fused polyethylene or polybutylene pipe.
Basically, water or a nontoxic antifreeze-water mix is circulated through buried polyethylene or polybutylene piping.
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