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annulus |
Also found in: Medical, Wikipedia, Hutchinson | 0.03 sec. |
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annulus [′an·yə·ləs] (anatomy) Any ringlike anatomical part. (botany) An elastic ring of cells between the operculum and the mouth of the capsule in mosses. A line of cells, partly or entirely surrounding the sporangium in ferns, which constricts, thus causing rupture of the sporangium to release spores. A whorl resembling a calyx at the base of the strobilus in certain horsetails. (mathematics) The ringlike figure that lies between two concentric circles. (mycology) A ring of tissue representing the remnant of the veil around the stipe of some agarics. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The meatal skin flap was elevated and the posterior portion of the anulus tympanicus was exposed. Yonemura commented, "The Xclose device provides an unique new method for treating the weakened tissue of the anulus fibrosus following a lumbar discectomy procedure. |
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