Definify.com
Webster 1913 Edition
Cycloidei
‖
Cy-cloi′de-i
(s?-kloi′d?-?)
, Noun.
pl.
[NL., fr. Gr.
κύκλοσ
circle + -oid
.] (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.