-səˌdē noun plural
Usage: capitalized
Etymology: New Latin, from Perca, type genus + -idae
: a family of vigorous active percoid fishes that is now usually restricted to freshwater forms of the northern hemisphere including the true perches, pike perches, and a few related forms (as the zingel) but that formerly also included the sand darters or was sometimes made nearly coextensive with Percoidea — see perca