annulus

(redirected from annular ring)
Also found in: Dictionary, Thesaurus, Medical.
Related to annular ring: annulus

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 ?
The annular nail has a high initial peak; however, the load generally decays quickly due to the annular rings "coring" the wood.
It should be noted that although the wider traces offer some protection against copper erosion of the exposed portion of the trace, the "knee"--the area where the annular ring meets the barrel--is typically a bit thinner than the barrel or the ring, and can be very vulnerable to erosion.
Classes 1 and 2 permit some missing annular ring on internal layers, expressed as "breakout angle.
Tenders are invited for Annular Ring Cathodic Protector
Shrinkage grooves appeared minimal, with the groove propagation only slightly deeper than the annular ring for both alloys.
In the past, breakout and annular ring requirements were for holewall reliability concerns.
Install mechanical anchorage or annular ring to tank.
Drill diameters were compared to copper pad sizes to ensure sufficient annular ring for minimum acceptability.
An established dissolution hierarchy confirmed that the knee location has the highest dissolution rate, followed (in order) by the annular ring (or pad) geometries and the inner barrel wall (Figure 1).