PASSIVE TRANSPORT

 I. (noun) 

Sense 1

Meaning:

Transport of a substance across a cell membrane by diffusion; expenditure of energy is not required

Classified under:

Nouns denoting natural processes

Hypernyms ("passive transport" is a kind of...):

transport (an exchange of molecules (and their kinetic energy and momentum) across the boundary between adjacent layers of a fluid or across cell membranes)

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