Source : Webster's Revised Unabridged Dictionary (1913)

Plectospondyli \Plec`to*spon"dy*li\, n. pl. [NL., fr. Gr. ?
   plaited + ?, ?, a vertebra.] (Zo["o]l.)
   An extensive suborder of fresh-water physostomous fishes
   having the anterior vertebr[ae] united and much modified; the
   Eventognathi.