Definition of "clupeid" 
- (noun) Any of various widely distributed soft-finned fishes of the family Clupeidae, which includes the herrings, menhadens, and sardines.
- (adjective) Of, relating to, or belonging to the family Clupeidae.
Use "clupeid" in a sentence
- "The larva of the horse-mackerel, on the other hand, is like a tadpole; it swims better than a clupeid larva of the same size - thus enabling it to flee predators more easily - and it has a bigger mouth to capture more and bigger prey."