This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A device that doubles the frequency or voltage of an input signal.

n. One who doubles

n. An instrument for augmenting a very small quantity of electricity, so as to render it manifest by sparks or the electroscope.

n. One who, or that which, doubles.

n. An instrument for augmenting a very small quantity of electricity, so as to render it manifest by sparks or the electroscope.

n. A part of a distilling apparatus for intercepting the heavier fractions and returning them to be redistilled.

n. A blanket or felt placed between the fabric and the printing table or cylinder.

n. One who or that which doubles; particularly, an instrument for augmenting a very small quantity of electricity, so as to render it manifest by sparks or the electrometer.

n. A still arranged for intercepting vapors of distillation, and redistilling them.

n. A machine for doubling and drawing silk.

n. The felting placed between a fabric to be printed and the printing-cylinder.

n. Same as double-ripper

n. A dish or platter used in gathering and removing fragments from the table.

n. an electronic device that doubles the voltage or the frequency of an input signal

"In the past, crews have repaired cracks in the external tank by removing the cracked aluminum and replacing it with a "doubler" -- a twice-as-thick section -- before replacing the foam insulation."

electronic device   

norremberg doubler   

low-noise    autozero    millimeter-wave    transimpedance    sample-and-hold