Cycloidei
Cy`cloi´de`i
n. pl. | 1. | (Zool.) 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. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.