Lophobranchii \Loph`o*bran"chi*i\, n. pl. [NL., fr. Gr. lo`fos a
crest or tuft + bra`gchion gill.] (Zool.)
An order of teleostean fishes, having the gills arranged in
tufts on the branchial arches, as the Hippocampus and
pipefishes.
[1913 Webster]