AQUEDUCT

n. A*k’we?-duskt, Gr., b8poxea cepaauel Lat., aquæduct us (=aque duct us [from ducere, to lead, conduct]). Fr., aqueduc, aquéduc. Ger., Was ser lei tung. It., acquedatta. Sp., acueducio. A canal, channel, or tube for the conveyance of a watery liquid (said also of a few canals which transmit blood-ve els or nerves). [L.J—A. of Cotunnius. Lat., aqueduct us Cotunnii (from the Latinized name of Cotugno). Fr., aqueduc de Cotugno. See A, of the vestibule A. of Fallopius. Lat., aquæduct us Fallopii Grom the Latinized name of Falloppio). Fr.. aquedue de Fallope. Ger., Fallopische Was ser lei tung, Spiral gang in der Paukenhähle. It., acquedotto di Falloppio. Sp., acueducto de Falopio. A canal in the petrous portion of the temporal bone, transmitting the facial nerve: it begins at the upper part of the lamina cribrosa, pa es outward and backward over the labyrinth of the ear, and terminates in the stylo-mastoid foramen. [C; L, 142.] —A. of Syivius. Lat., aque duct us Sylvii (from the Latinized name of Dubois). Fr., aqueduc de Sylvius, entonnoire, canal intermédiaire des ventricules, Ger., Sylvischer Gang, Sylvische Was ser lei tung, Canal der Vierhügel. It., acquedotto di Silvio, canaie intermedia rio dei ventricoli. Sp., acueducto de Sitvio. Syn.: iter e tertio ad quartum ventriculum, canal is median us (seu corporum [seu tuberculorum] quadrigeminorum). A narrow canal, about half an inch long, leading from the third into the fourth ventricle of the brain..It is lined with ciliated epithelium and surrounded with gray matter which is in relation with the roots of the third, fourth, and fifth nerves. [I, 15; K.J—A. of the cochlea. Lat., aqueduct us cachleæ. Fr., aquedue du limaçon. Ger., Was ser lei tung der Schnecke. It., acquedatto dell a chiocciola. Sp., acueducto del caracol. A small canal which arises in the scala tympani, in the neighborhood of the fenestra rotunda, and opens into the cranial cavity near the lower edge of the pyramid, effecting an immediate communication of the arachnoid space with the per i lymphatic fluid of the labyrinth. [F, 32.|—A. of the vestibule. Lat., aquæduct us vestibuli (seu Cotunnit), canal is endolymphatic us. Fr., aqueduc du vestibule. Ger., Was ser lei tung des Vorhofs. It., acquedatto del vestibolo. Sp cueducto del vestibulo, A canal which arises as a thin membranous tube from the utricle, in the immediate neighborhood of the embouchure of the superior and posterior semicircular canals, then proceeds through a thin o eous canal to the posterior wall of the pyramid, and opens into a spacious cul-de-sac covered by the dura mater and connected with the endolymphatic spaces of the labyrinth. [F, 32.]—Sylvian a. See A. of Sylvius.