annulus


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
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 ?
With casing integrity issues (pressure in the annulus) a growing concern due to the stock of ageing wells, Expro's annulus intervention solutions are helping to address well integrity challenges.
In addition, when fused to T4, the normalized values of the annulus fibrosus was the lowest (60%) and the ISL/SSL complex force was lower (76%) compared to when fused to other thoracic levels, revealing that the risk of damage to the annulus fibrosus was lower.
The smaller the annulus, the more frequently the PV lesions were observed, quickly repaired and eventually a competent PV was obtained24.
Total ADC values of L1 intervertebral discs in Groups A (0.00154 [+ or -] 0.00008), B (0.00130 [+ or -] 0.00005), C (0.00122 [+ or -] 0.00007), and D (0.00107 [+ or -] 0.00007) significantly decreased with age ( P < 0.01); nucleus pulposus ADC values of L1 intervertebral discs in Groups A (0.00164 [+ or -] 0.00005), B (0.00156 [+ or -] 0.00007), C (0.00147 [+ or -] 0.00008), and D (0.00140 [+ or -] 0.00007) significantly decreased with age ( P < 0.01); annulus fibrosis ADC values of L1 intervertebral discs in Groups A (0.00129 [+ or -] 0.00014), B (0.00110 [+ or -] 0.00011), C (0.00095 [+ or -] 0.00009), and D (0.00082 [+ or -] 0.00012) significantly decreased with age ( P < 0.01).
Kim [12] provides another annulus containing all the zeros of a polynomial with the binomial coefficients.
For those without ESRD or abnormal calcium metabolism, further studies may help determine whether cardiac CAT can involve the mitral annulus and result in an appearance similar to MAC on TTE.
Tricuspid valve detachment (TVD) by separating the septal leaflet and sometimes anterior leaflet of tricuspid valve from the annulus by giving an incision just at their confluence to have better view of VSD.
Out of 307 operated patients, 4 (1.3%) patients had previous modified Blalock Taussig shunts, 2 (0.6%) associated ASD with TOF, 3 (0.9%) had co-association of PDA, 2 (0.6%) large conal arterial branch crossing at the annulus, 3 (0.9%) dextrocardia with situs inversus, 12(3.9%) TOF with double outlet right ventricle (DORV), 2 (0.6%) with associated complete AV canal defect, 8 (2.60%) with absent pulmonary valve syndrome, 15 (5.5%) with left pulmonary artery stenosis.
As standard, Tecno Plugs feature two elastomeric seals, the dual-seal configuration providing an annulus void which is pressure-tested to verify both seals are leak-tight.
(1-3) In this article, we introduce the mobilization of the mastoid segment of the facial nerve during the elevation of the tympanic annulus by a straight microneedle in a myringoplasty operation.