Science Dictionary
pump   (pŭmp)  Pronunciation Key 

(click for larger image in new window)

  1. A device used to raise or transfer fluids. Most pumps function either by compression or suction.

  2. A molecular mechanism for the active transport of ions or molecules across a cell membrane.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Explore Dictionary.com
Previous Definition: unpumpable
Next Definition: unradiant
Words Near: unpumped
More from Thesaurus.com
Synonyms and Antonyms for unpumped
More from Reference.com
Search for articles containing unpumped
More from Dictionary.com Translator
Dictionary.com Word FAQs

Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.

Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature