Lophobranchs

Part of speech: noun

Definitions

1. Any of a group of bony fishes whose gills are arranged in small tufts rather than comb-like plates, including seahorses and pipefishes
2. Small marine fishes belonging to an order characterized by tufted gills, among them the seahorses and the pipefishes
3. Members of the bony fish order Lophobranchii, distinguished by their clustered tuft-like gills and elongated bodies

Etymology: Lophobranchs are the seahorses, pipefishes and their relatives, and the name is a plain piece of Greek construction: "lophos" meaning "crest" or "tuft", joined to "branchia", "gills". The tuft is the giveaway. These fishes have gills gathered into small, tufted clusters rather than the broad, comb-like gill plates of most fishes, and the name describes that anatomy directly. The word is the plural of "lophobranch", a singular form built the same way. Because the name is a descriptive compound coined from classical elements, it reads as a technical label rather than a word that passed down through ordinary speech. Its meaning has not shifted since it was formed: it still names a group defined by the shape of its gills.