noun ·2 syllables ·Rare ·Advanced level

Definitions

Noun

1. 1
   any of a group of primitive marine animals, having a notochord instead of a backbone
2. 2
   small translucent lancet-shaped burrowing marine animal; primitive forerunner of the vertebrates wordnet
3. 3
   any of a group of primitive marine animals, having a notochord instead of a backbone; of subphylum Cephalochordata
4. 4
   any of a group of primitive marine animals, having a notochord instead of a backbone; of subphylum Cephalochordata; of order Amphioxiformes

Synonyms

All synonyms

amphioxus

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