annular

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annular

[′an·yə·lər]
(mining engineering)
The space between the casing and wall of a hole or between a drill pipe and casing.

annular

Said of a ring-shaped structure or object.
References in periodicals archive ?
It is entirely possible that an annular eclipse may appear as annular outside its path of annularity, where it is essentially partial.
The north tip of the path of annularity will touch India first at 8.
Covering 95 per cent of the Sun's surface, Monday's eclipse will cause a significant drop in light levels under the path of annularity.
For example, federal budget process in 1995 represents a worst case scenario; the norm of annularity was fundamentally shattered, major segments of the government were temporarily shut down and the Secretary of Treasury was forced to extraordinary actions to avoid a default on U.
Before his unseemly run-in with the microwave, the distant, brooding father, James Orin Incandenza, a former junior tennis star and a retired physicist who pioneered cold fusion by hamessing the dark power of - you guessed it - annularity, founded the Enfield Tennis Academy, and then took up a career as an "apres-garde" filmmaker.
It appears as a small disk with a hint of annularity visible when viewed through a filter.
De Roy and his team observed what he described as an intermediate event, neither complete totality nor obvious annularity, with the Moon not quite covering the diameter of the Sun.
The eclipse is visible mostly over the Pacific, but the path of annularity crosses northwestern Australia, and the partial phase is visible in most of Melanesia, Australia, and New Zealand.
Small binoculars and telescopes around 10cm aperture will show a hazy circular patch with no indication of annularity, while 25cm and upwards begin to show the shape familiar in popular images, particularly if used with a wide field eyepiece and OIII filter.
At 276x the annularity is easier to see, and the galaxy behind its northern edge looks a bit too straight to be part of the ring.
There the Sun will be a good 22" above the western horizon, and annularity will last 4 minutes 47 seconds as seen from the centerline.
With a narrowband or O III filter, the 10-inch scope at 220 x shows traces of annularity in NGC 2610.