| Word | Definitions | Synonyms |
|---|---|---|
| chaetognath | (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 | Synonyms: arrowworm |
| plectognath | (noun) tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines | Synonyms: plectognath fish |
| toxicognath | (noun) either of a pair of poison fangs in the modified front pair of legs of the centipede | - |