| recessus suprapinealis | A variable diverticulum from the posterior portion of the third ventricle of the brain, running backward some distance above and beyond the pineal recess. Synonym: recessus suprapinealis. (05 Mar 2000) |
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| recessus triangularis | An occasional evagination of the anterior wall of the third ventricle of the brain between the anterior commissure and the diverging pillars of the fornix. Synonym: recessus triangularis. (05 Mar 2000) |
| pars cupularis recessus epitympanici | The dome-shaped, highest portion of the epitympanic recess. Synonym: pars cupularis recessus epitympanici. (05 Mar 2000) |