1. SYN: cupular cecum of the cochlear duct. 2. One of the three parts of the membranous labyrinth of the inner ear of lower vertebrates; in mammals, the l. becomes the cochlea. [L. flask]
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1) the upper extremity of the scala media that is attached to the cupula at the upper part of the helicotrema
2) an organ of vertebrates below the mammals that corresponds to the cochlea
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la·ge·na (lə-jeґnə) [L. “flaskâ€] 1. a part of the upper extremity of the ductus cochlearis. 2. the curved, flask-shaped organ of hearing in vertebrates lower than mammals.Medical dictionary. 2011.