The Collaborative International Dictionary
Clupeoid
Clupeoid \Clu"pe*oid\, a. [L.clupea a kind of fish, NL., generic name of the herring + -oid.] (Zo["o]l.) Of or pertaining to the Herring family.
Wiktionary
clupeoid
a. (context zoology English) Of or relating to fish closely related taxonomically to herring.