ion channel

noun

Definition of ion channel

:a cell membrane channel that is selectively permeable to certain ions (as of calcium or sodium)

First Known Use of ion channel

1985


Medical Dictionary

ion channel

noun

medical Definition of ion channel

:a cell membrane channel that is selectively permeable to certain ions (such as of calcium or sodium)
  • Researchers now know that not only do all cells, including nerve cells, have ion channels through which substances such as sodium and calcium move in and out, but that particular subtypes of sodium channels govern the transmission of pain.
  • —Judy ForemanThe Los Angeles Times24 Nov. 2003

Seen and Heard

What made you want to look up ion channel? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

smooth or hairless

Get Word of the Day daily email!

Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

  • stylized-drawing-of-woman-pole-vaulting-across-gap-to-get-trophy
  • Which is a synonym of fuliginous?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Syn City

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!