cycloidei
Cy*cloi"de*i (s-kloi"d-), n. pl. Etym: [NL., fr. Gr. -oid.] (Zoöl.) Defn: An order of fishes, formerly proposed by Agassiz, for those with thin, smooth scales, destitute of marginal spines, as the herring and salmon. The group is now regarded as artificial.