Annulation
ahd-5
noun.
The act or process of forming rings.
noun.
A ringlike structure, segment, or part.
The Century Dictionary and Cyclopedia
noun.
A circular or ring-like formation.
noun.
The act of forming rings; the act of becoming a ring.
noun.
The state of being annulate or annulated.
the GNU version of the Collaborative International Dictionary of English
noun.
A circular or ringlike formation; a ring or belt.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
The formation of a
ring
noun.
Any
reaction
that forms a ring of atoms
noun.
Any structure in the form of a ring