The Collaborative International Dictionary of English v.0.48:

Cycloganoidei \Cy`clo*ga*noi"de*i\ (s?"kl?-g?-noi"d?-?), n. pl.
   [NL., fr. Gr. ky`klos circle + NL. ganoidei. See Ganoid.]
   (Zool.)
   An order of ganoid fishes, having cycloid scales. The bowfin
   (Amia calva) is a living example.
   [1913 Webster]