- cerebral a. an ependyma-lined canal in the mesencephalon about 20 mm long, connecting the third to the fourth ventricle. SYN: aqueductus mesencephali [TA], aqueductus cerebri, a. of cerebrum, aqueductus sylvii, iter a tertio ad quartum ventriculum, sylvian a..
- cochlear a. [TA] a fine canal in the temporal bone, opening superior to the tympanic canaliculus, connecting the perilymphatic space of the cochlea with the subarachnoid space. SYN: aqueductus cochleae [TA], ductus perilymphaticus, perilymphatic duct.
- Cotunnius a. SYN: vestibular a..
- vestibular a. [TA] a bony canal running from the vestibule and opening on the posterior surface of the petrous portion of the temporal bone, giving passage to the endolymphatic duct and a small vein. SYN: aqueductus vestibuli [TA], aqueductus cotunnii, Cotunnius a., Cotunnius canal.
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aq·ue·duct 'ak-wə-.dəkt n a canal or passage in a part or organ
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n.
(in anatomy) a canal containing fluid. For example, the aqueduct of the midbrain (cerebral aqueduct, aqueduct of Sylvius) connects the third and fourth ventricle.
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aq·ue·duct (akґwə-dukt″) a passage or channel in a body structure or organ; see also aqueductus.Medical dictionary. 2011.