Meanings
nounCD21 (uncountable)
- uncountablebiochemistryB-cell and FDC membrane protein involved in the complement system and B cell coreceptor complex, and bound by EBV.
Synonyms: Complement receptor type 2, complement C3d receptor, Epstein-Barr virus receptor
Synonyms & antonyms
nounB-cell and FDC membrane protein involved in the complement system and B cell coreceptor complex, and bound by EBV.
Similar
Complement receptor type 2complement C3d receptorEpstein-Barr virus receptor
Origin
from cluster of differentiation
Full word history & related roots →Cite this entry
APA
CD21. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/CD21
MLA
“CD21.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/CD21. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “CD21,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/CD21.
Source: CD21 on Wiktionary, CC BY-SA 4.0.