arrowworm

Từ điển WordNet v3.1 - WordNet Dictionary

noun

any worm of the Chaetognatha;
transparent marine worm with horizontal lateral and caudal fins and a row of movable curved spines at each side of the mouth
• Syn:
chaetognath
• Hypernyms:
worm
• Hyponyms:
sagitta
• Member Holonyms:
Chaetognatha, phylum Chaetognatha