active transport


Definition of active transport

: the movement of a chemical substance by the expenditure of energy against a gradient in concentration or in electrical potential across a plasma membrane — compare passive transport

Examples of active transport in a Sentence

Recent Examples on the Web Now With congestion from road traffic increasing, many drivers across the continent are turning to active transport as an alternative. Flavie Halais, Wired, "In the Walking Capitals of the World, Drivers Still Rule the Road," 30 May 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'active transport.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of active transport

1922, in the meaning defined above

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Time Traveler for active transport

Time Traveler

The first known use of active transport was in 1922

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Statistics for active transport

Cite this Entry

“Active transport.” Dictionary, Merriam-Webster, Accessed 20 Apr. 2021.

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More Definitions for active transport

active transport


Medical Definition of active transport

: movement of a chemical substance by the expenditure of energy against a gradient in concentration or electrical potential across a plasma membrane

More from Merriam-Webster on active transport Encyclopedia article about active transport

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