labyrin'thus

[G. labyrinthos, a maze, an intricate system of intercommunicating pa ages.] Labyrinth. term applied to several anatomical structures with numerous intercommunicating cells or canals noting specifically the internal ear, comprising the semicircular canals, vestibule, and cochlea. ethmoid a'lis [BNA], ethmoidal labyrinth, lateral ma of the ethmoid bone a ma of air-cells with thin bony walls dependent on either side from the horizontal plate; the cells are arranged in three groups, anterior, middle, and posterior, and are closed in externally by the lamina papyracea, or os planum, which forms part of the wall of the orbit. L membrana'ceus, [BNA], membranous labyrinth, an arrangement of communicating membranous sacs, filled with endolymph and surrounded by perilymph, lying within the cavity of the o eous labyrinth; its chief divisions are: sacculus, utriculus, duct us cochlear is, and duct us semicirculares. 1. os's eus [BNA], o eous labyrinth, bony labyrinth, a series of cavities (cochlea, vestibule, and semicircular canals) in the petrous portion of the temporal bone which lodge the membranous labyrinth with its terminal auditory apparatus. 1. pu'bicus im'p'ar, 1. pudenda'lis, plexus pudendal is.