1. 
[syn: Synentognathi, order Synentognathi]
The Collaborative International Dictionary of English v.0.48:
Synentognathi \Syn`en*tog"na*thi\, n. pl. [NL., fr. Gr. sy`n
   with + 'ento`s within + gna`qos jaw.] (Zool.)
   An order of fishes, resembling the Physoclisti, without
   spines in the dorsal, anal, and ventral fins. It includes the
   true flying fishes.
   [1913 Webster]
WordNet (r) 3.0 (2006):
Synentognathi
    n 1: order of fishes having spineless fins; needlefishes;
         sauries; flying fishes; halfbeaks [syn: Synentognathi,
         order Synentognathi]