aquseduc'tus

[L. aqua, water, -h duct us, duct.] Aqueduct, conduit, canal, a. cer'ebri [BNA], aqueduct of the cerebrum, aqueduct of Sylvius, iter a tertio ad quartum ventriculum; a canal about f inch long, lined with ciliated epithelium, leading downward through the mesencephalon from the third to the fourth ventricle. a. coch'leae, duct us per i lymphatic us, a. Cotun'- nii, a, vestibuli. a. Fallo'pii, canal is facial is. Ei.Syl'vii, a, cerebri, a. vestib'uli [BNA], aqueduct of the vestibule, aqueduct of Cotunnius, a canal running from the vestibule and opening on the posterior surface of the petrous portion of the temporal bone, giving pa age to the duct us endol3miphaticus and a small vein,