Definition of doublers:
(n) :
One who doubles.
(n) :
A device with two electrical plugs that plugs into an electrical outlet, effectively converting the electrical outlet into two; socket converter.
(n) :
An instrument for augmenting a very small quantity of electricity, so as to render it manifest by sparks or the electroscope.
(n) :
(structural engineering) A metal plate riveted or welded over a preexisting metal structural component to reinforce it and relieve the stress on the preexisting component, or to serve as a patch where part of the original structure has failed or been removed.
(n) :
Part of a distilling apparatus for intercepting the heavier fractions and returning them to be redistilled.
(n) :
(metalworking) A person employed in a roller mill to fold the hot metal plates in half.