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.
Various small, round solid objects.
A narrow molding with semicircular section.
A bubble, in spirits.
Each in a string of small balls making up the rosary or paternoster.
Knowledge sufficient to direct one's activities to a purpose.
A small, round ball at the end of a barrel of a gun used for aiming.
A small drop of water or other liquid.
A small, round object with a hole to allow it to be threaded on a cord or wire, particularly for decorative purposes.
A rigid edge of a tire that mounts it on a wheel; tire bead.
To cause beads to form on (something).
To apply beads to.
To form into a bead.