Aqueduct

or Aqueduct us (ak' '-we-dukt ', or ak-weduk'-tus). Used of ducts or canals in various parts of the body. A. cerebri, the infundibulum. A. cochleae, aqueduct of the cochlea. A. of Cotunnius, the aqueduct of the vestibule, extending from the utricle to the posterior wall of the pyramid in the brain. A. Fallopii, the canal of the portio dura in the petrous portion of the temporal bone. A. Sylvii, the aqueduct of Sylvius from the third to the fourth ventricle, the iter a tertio ad quartum ventriculum. A. vestibuli, aqueduct of the vestibule of the ear.