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passive transport

Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The movement of a chemical substance across a cell membrane without expenditure of energy by the cell, as in diffusion.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. transport of a substance across a cell membrane by diffusion; expenditure of energy is not required

Etymologies

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Examples

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