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
Test Your Vocabulary
Name That Food
-
- Name these cookies!

Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share active transport
Time Traveler for active transport
The first known use of active transport was in 1922
See more words from the same year