A ring- or donut-shaped area or structure.
The ring of the sun not covered by the moon in an annular solar eclipse.
Structure in a fern that consists of differentially thick-walled cells on a sporangium that bend and distort as a result of drying.
The region in a plane between two concentric circles of different radii.
The membranous remnants of a partial veil which leaves a ring on the stem of a mushroom.
The space contained between the centre well bore and any external tubing. Sometimes used for separated gas flow.
Any topological space homeomorphic to the region in a plane between two concentric circles of different radius.
A ring- or tube-shaped component such as a ferrule.
As much as fills a thimble (sense 1); a thimbleful.
A metal ring which a cable or rope intended for attaching to other things is looped around as a protection against chafing.
A pitted, now usually metal, cup-shaped cap worn on the tip of a finger, which is used in sewing to push the needle through material.
A thimble or similar object used in thimblerig (“a game of skill which requires the bettor to guess under which of three thimbles or small cups a pea-sized object has been placed after the person operating the game rapidly rearranges them”).
A socket in machinery shaped like a thimble.
To sew.
To use a thimble (noun sense 1).