plectognathi

from The Century Dictionary.

• An order of physoclistous fishes, with the cranium normal, the premaxillaries usually coössified behind with the maxillaries, the dentary coössified with the articular and angular bones, and the lower pharyngeals distinct: so called from the extensive ankyloses of the jaws.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Zoöl.) An order of fishes generally having the maxillary bone united with the premaxillary, and the articular united with the dentary.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun boxfishes; filefishes; globefishes; ocean sunfishes; triggerfishes; puffers