lagena

< /ləˈdʒi ni/. Zoology.

1. an outpocketing of the saccule of birds, reptiles, and bony fishes corresponding to the cochlear duct of mammals.

noun

1. a bottle with a narrow neck
2. an outgrowth of the sacculus in the ear of fishes and amphibians, thought to be homologous to the cochlea of mammals

n. pl. la•ge•nae (-nē)

1. One of the three parts of the membranous labyrinth of the inner ear of nonmammalian vertebrates.