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Definition of Annulation
1. n. A circular or ringlike formation; a ring or belt.
Definition of Annulation
1. Noun. The formation of a ring ¹
2. Noun. (organic chemistry) Any reaction that forms a ring of atoms ¹
3. Noun. Any structure in the form of a ring ¹
¹ Source: wiktionary.com
Definition of Annulation
1. [n -S]