presenilin

noun
pre·​sen·​il·​in | \ prē-ˌse-ˈnil-ən How to pronounce presenilin (audio) \

Medical Definition of presenilin

: any of several proteins of cell membranes that are believed to contribute to the development of Alzheimer's disease

Learn More about presenilin

Cite this Entry

“Presenilin.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/presenilin. Accessed 26 Jan. 2021.

Comments on presenilin

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

WORD OF THE DAY

Test Your Vocabulary

Slippery Words Quiz—Changing with the Times

  • ducreux self portrait yawning
  • What is an earlier meaning of nice?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
 AlphaBear 2

Spell words. Make bears.

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!