Labrum

(la' -brum). In biology, a lip-like structure, usually the upper, when two are present, the lower being the labium. substance of the kidney. See Kidney . L., Membranous, the membranqus cavity within the o eous labyrinth, from which it is partly separated by the perilymph. comprises' two canals sacs contained within the vestibule, It the semicircular and the canal of Labyrinth of the Ear Laid Open. a. Fovea elliptic a. b. Fovea hemispheric a. c. Common entrance of the posterior and superior semicircular canals. d. Opening of the aqueduct of the vestibule, e. Superior semicircular canal, f. Posterior, g. Inferior semicircular canal, h. Spiral canal of cochlea, i. Opening of the aqueduct of the cochlea, j. Lamina spiral is. the cochlea. L. of the Kidney. See Labyrinth, Cortical. L., O eous, the bony capsule of the internal ear, communicating in front with the cochlea and behind with the semicircular canals. L. Pit. See Ear.