plectognath

n.
Any of various tropical marine fishes of the order Tetraodontiformes or Plectognathi, which includes the triggerfishes, puffers, and trunkfishes.

[From New Latin Plectognathī, order name : Greek plektos, twisted + Greek gnathos, jaw; see -gnathous.]

plectognath plec'tog·nath' adj.

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The noun has one meaning:

Meaning #1: tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines
  Synonym: plectognath fish

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