CD4

noun, often attributive
\ˌsē-(ˌ)dē-ˈfȯr \

Definition of CD4 

: a large glycoprotein that is found on the surface especially of helper T cells, that is the receptor for HIV, and that usually functions to facilitate recognition of antigens by helper T cells

First Known Use of CD4

1984, in the meaning defined above

History and Etymology for CD4

cluster of differentiation

Keep scrolling for more

Learn More about CD4

Dictionary Entries near CD4

CD

Cd

cd

CD4

CDC

CDD

cde

Statistics for CD4

Look-up Popularity

Time Traveler for CD4

The first known use of CD4 was in 1984

See more words from the same year

Keep scrolling for more

More Definitions for CD4

CD4

noun, often attributive
\-ˈfōr, -ˈfȯr \

Medical Definition of CD4 

: a large glycoprotein that is found especially on the surface of helper T cells, that is the receptor for HIV, and that usually functions to facilitate recognition by helper T cell receptors of antigens complexed with molecules of a class that are found on the surface of antigen-presenting cells (as B cells and macrophages) and are the product of genes of the major histocompatibility complex

Comments on CD4

What made you want to look up CD4? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to clear from alleged fault or guilt

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Dictionary Devil

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!