plural noun
Plec·​tog·​na·​thi | \plekˈtägnəˌthī\

Definition of Plectognathi 

: an order of bony fishes that generally have the maxillary bone united with the premaxillary, the posttemporal united with the skull, and the gill openings greatly reduced in size, have the ventral fins rudimentary or wanting and the body usually covered with bony plates, spines, or small rough ossicles, and include the boxfishes, filefishes, puffer fishes, sunfishes, triggerfishes, and related forms

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Other Words from Plectognathi

plectognathic \ ¦plekˌtäg¦nathik \ adjective
plectognathous \ (ˈ)plek¦tägnəthəs \ adjective

History and Etymology for Plectognathi

New Latin, from plect- + -gnathi, plural of -gnathus

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