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.
So shaped that it can be worn on a buttonhole or it is similar to a buttonhole.
A small slot-like cut or incision, made for example by an accident with the scalpel.
A flower worn in a buttonhole for decoration.
The mouth and/or nose and/or eyes if appearing tiny.
A hole through which a button is pushed to secure a garment or some part of one.
anus, batty hole.
To detain (a person) in conversation against their will.
To cut one or more buttonholes (in).
To sew by buttonhole stitch.
To apply a flowery formation in.