Webster's Revised Unabridged Dictionary · 1913

Lophobranchii

Lophobranchii , noun, plural

[New Latin, from Greek lo`fos a crest or tuft + bra`gchion gill.]

(Zoology) An order of teleostean fishes, having the gills arranged in tufts on the branchial arches, as the Hippocampus and pipefishes.