# doubler

> English word · Noun · frequency rank #91,439

## Definitions
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. 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.
4. Part of a distilling apparatus for intercepting the heavier fractions and returning them to be redistilled.
5. 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.
7. A device with two electrical plugs that plugs into an electrical outlet, effectively converting the electrical outlet into two; socket converter.
8. A diaper insert.

## Etymology
From double (verb) + -er.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/doubler