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direct-acting

[dih-rekt-ak-ting, dahy-]
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adjective
  1. (of a steam pump) having the steam pistons connected directly to the pump pistons without a crankshaft or flywheel.
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Origin of direct-acting

First recorded in 1855–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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