The Collaborative International Dictionary
Lagenae
Lagena \La*ge"na\, n.; pl. L. Lagen[ae], E. Lagenas. [L., a flask; cf. Gr. ?, ?.] (Anat.) The terminal part of the cochlea in birds and most reptiles; an appendage of the sacculus, corresponding to the cochlea, in fishes and amphibians.
Wiktionary
lagenæ
n. (en-irregular plural of: lagena)