Definition of pseudobranch in English:

pseudobranch

noun

Zoology
  • A structure resembling a gill, but not functioning as one; specifically (in many fishes) a structure anterior to the gills that in adults receives blood that has already been oxygenated in the gills, but which may have had a respiratory function in early life.

Origin

Late 19th century; earliest use found in Standard Natural History. From pseudo- + -branch.

Pronunciation

pseudobranch

/ˈs(j)uːdə(ʊ)ˌbraŋk/