doublers

Noun

doubler (plural doublers)

1. One who doubles.
2. An instrument for augmenting a very small quantity of electricity, so as to render it manifest by sparks or the electroscope.
3. (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.
   • The mechanics fastened a doubler over the hole where the cracked section of the plane's skin had been cut out.
4. Part of a distilling apparatus for intercepting the heavier fractions and returning them to be redistilled.
5. (calico printing) A blanket or felt placed between the fabric and the printing table or cylinder.
6. A person employed in a roller mill to fold the hot metal plates in half.

See all 10 meanings of doubler