noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   a 120-mm (5-inch) CD (compact disc)
2. 2
   protein found on B and especially on activated T cells
3. 3
   a 5-inch CD single

Etymology

Etymology 1

from Compact Disc

Etymology 2

from cluster of differentiation

Related phrases

cd dacd singlecompact disct cell

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.