Source : Webster's Revised Unabridged Dictionary (1913)

Trunkfish \Trunk"fish`\, n. (Zo["o]l.)
   Any one of several species of plectognath fishes, belonging
   to the genus {Ostracion}, or the family {Ostraciontid[ae]},
   having an angular body covered with a rigid integument
   consisting of bony scales. Some of the species are called
   also {coffer fish}, and {boxfish}.

Source : WordNet®

trunkfish
     n : any of numerous small tropical fishes having body and head
         encased in bony plates [syn: {boxfish}]
     [also: {trunkfishes} (pl)]