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

And the people who reported getting the most physical activity were the ones who had exercise built into their daily lives, through simple things like active transport to work, their jobs, or housework. Julia Belluz, Vox, "Americans sit too much. Standing desks aren’t going to fix the problem.," 20 Nov. 2018

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

The first known use of active transport was in 1922

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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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a shady place in a garden or forest

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