Scrabble Dictionary

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Yes, impedance is playable

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SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)

"Impedance" Definition

noun

A measure of the total opposition to current flow in an alternating current circuit, made up of two components, ohmic resistance and reactance, and usually represented in complex notation as Z = R + iX, where R is the ohmic resistance and X is the reactance.
An analogous measure of resistance to an alternating effect, as the resistance to vibration of the medium in sound transmission.
something that as.
The apparent opposition in an electrical circuit to the flow of an alternating current that is analogous to the actual electrical resistance to a direct current and that is the ratio of effective electromotive force to the effective current.
The ratio of the pressure to the volume displacement at a given surface in a sound-transmitting medium .

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