# CD22

> English word · Noun

## Definitions
1. a molecule found on the surface of mature B cells and to a lesser extent on some immature B cells, helping to prevent the overactivation of the immune system and the development of autoimmune diseases

## Etymology
from cluster of differentiation-22

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/cd22