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 ?
These cyclic structures of amide groups propagated to the larger structure through nitrile oligomerization and dehydrogenation while the amide groups disappeared and the molecules annularly cross-linked (22), (23).
The cooling air is delivered from 38 nozzles installed annularly on the side wall at a height of 14.