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direct-acting

American  
[dih-rekt-ak-ting, dahy-] / dɪˈrɛktˌæk tɪŋ, daɪ- /

adjective

  1. (of a steam pump) having the steam pistons connected directly to the pump pistons without a crankshaft or flywheel.


Etymology

Origin of direct-acting

First recorded in 1855–60

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The infection can now be stopped, in most cases, by taking direct-acting antiviral medication for two to three months.

From Los Angeles Times • Mar. 9, 2023

For clinicians, Low says, that moment can’t come soon enough: “The world has been searching for a direct-acting antiviral drug for decades.”

From Science Magazine • Oct. 6, 2021

Rachel Bender Ignacio, a physician-scientist at the Fred Hutchinson Cancer Research Center in Seattle, anticipates that the virus will develop less resistance against direct-acting small-molecule drugs such as molnupiravir than it has against monoclonal antibodies.

From Scientific American • Jul. 15, 2021

Two participants in one of Sise's trials weren't cured after a single course of direct-acting antivirals, Sise acknowledged, though both were cured after a subsequent course.

From Salon • Dec. 26, 2020

Nearly all sea-going vessels built toward the close of the period here considered were screw-steamers, fitted with direct-acting, quick-working engines.

From A History of the Growth of the Steam-Engine by Thurston, Robert H.

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