annulus


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Related to annulus: Annulus fibrosus, Annulus of Zinn

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.
References in periodicals archive ?
Therefore, it can permit a vacuum in the annulus for insulation, if required.
When the intervertebral disc is healthy, the nucleus is confined within the fibers of the annulus fibrosus.
The computed friction pressure gradients by the present approach are compared with the correlation proposed by Jones and Leung [53] for laminar flow of Newtonian fluids in concentric annulus and the analytical solution of Fredrickson and Bird [9] using the approach introduced by Reed and Pilehvari [54] for non-Newtonian power law fluids and the numerical results are in good agreement (within 1%).
For otoliths with a final margin category of III, the marginal increment was considered to be close to a whole annulus and therefore the age was adjusted by adding one to the agreed upon count of annuli.
Most of these ejected particles eventually circled back, returning to the annulus.
In this paper, heat transfer is studied experimentally and numerically for PCM (paraffin wax) encapsulated in the horizontal annulus of two coaxial circular cylinders with isothermal and adiabatic condition at the inner and the outer cylinder, respectively.
Several studies have examined the anatomic relationship of the facial nerve to the tympanic annulus in an attempt to decrease the incidence of iatrogenic facial nerve injury.
The analysis showed that the annulus is composed, at least in part, of septin 4 and when this protein is removed, as is the case in Kissel's infertile mice, the annulus does not form.
The following day was spent in the workshop where Steve Vick International carried out demonstrations of the annulus sealing techniques to be used in the next stage of the project--transferring individual services.
Trial assemblies were PE lined as individual pipe strings, welded as double joints for full-scale reeling trials and subjected to pressure testing and leak detection of the PE annulus.
The risk of cardiovascular death among 1,102 study participants with mitral annulus calcification was elevated 2.
Reynolds: We use the ICI Annulus Method which provides a continuous strain gradient from 0 to 100% across the specimen.