doubler

Definitions

• One who doubles.
• An instrument for augmenting a very small quantity of electricity, so as to render it manifest by sparks or the electroscope.
• (US) A tenement house having two families on each floor.
• (colloquial) A biplane aeroplane or kite.
• Part of a distilling apparatus for intercepting the heavier fractions and returning them to be redistilled.
• (calico printing) A blanket or felt placed between the fabric and the printing table or cylinder.
• A person employed in a roller mill to fold the hot metal plates in half.
• A device with two electrical plugs that plugs into an electrical outlet, effectively converting the electrical outlet into two; socket converter.