| agnathan | (noun) eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms | Synonyms: jawless fish, jawless vertebrate |
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| anathema | (noun) a formal ecclesiastical curse accompanied by excommunication | - |
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| (noun) a detested person | Synonyms: bete noire |
| anathematisation | (noun) the formal act of pronouncing (someone or something) accursed | Synonyms: anathematization |
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| anathematization | (noun) the formal act of pronouncing (someone or something) accursed | Synonyms: anathematisation |
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| 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 |
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| compsognathus | (noun) very small bipedal carnivorous dinosaur of the late Jurassic in Bavaria | - |
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| gnathion | (noun) the most inferior point of the mandible in the midline | - |
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| gnathopod | (noun) One of a set of three paired appendages on the thorax of a decapod crustacean, located just posterior to the maxillae and used in feeding. | Synonyms: maxilliped |
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| gnathostome | (noun) a vertebrate animal possessing true jaws | - |
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| plectognath | (noun) tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines | Synonyms: plectognath fish |
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| prognathism | (noun) the condition of being prognathous; the condition of having a projecting jaw | - |
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| toxicognath | (noun) either of a pair of poison fangs in the modified front pair of legs of the centipede | - |
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