perc·es·o·ces \(ˈ)pər|kesəˌsēz, -|se-\noun plural Usage: capitalized Etymology: New Latin, from Latin perca perch + esoces, plural of esox pike — more at perch, esox in some classifications: a suborder of Percomorphi or sometimes a separate order including the gray mullets (Mugilidae), the barracudas, the silversides, and other related fishes • perc·es·o·cine\-esəˌsīn\adjective or noun