Noun | 1. | Ephippidae - small family comprising the spadefishes fish family - any of various families of fish order Perciformes, order Percomorphi, Perciformes, Percomorphi - one of the largest natural groups of fishes of both marine and fresh water: true perches; basses; tuna Chaetodipterus, genus Chaetodipterus - a genus of Ephippidae |