1) Ring formation
Found on
https://www.crosswordclues.com/clue/annulation
Annulation (derived from annular, occasionally annelation) in organic chemistry is a chemical reaction in which a new ring is constructed on another molecule (often another ring). Examples are the Robinson annulation, Danheiser annulation and certain cycloadditions. Annular molecules are constructed from side-on condensed cyclic segments, for exam...
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http://en.wikipedia.org/wiki/Annulation
• (n.) A circular or ringlike formation; a ring or belt.
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http://thinkexist.com/dictionary/meaning/annulation/
(from the article `segmentation`) ...the particular metamerism within each group clearly demonstrates the derivative relationship of its members. In Acanthocephala and some members of ...
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http://www.britannica.com/eb/a-z/a/78
A transformation involving fusion of a new ring to a molecule via two new bonds. Some authors use the term 'annelation' for the fusion of an additional ring to an already existing one, and 'annulation' for the formation of a ring from one or several acyclic precursors, but this distinction is not made generally. DANHEISER, GERE and SARD (1982), JUN...
Found on
http://www.chem.qmul.ac.uk/iupac/gtpoc/A.html
A series of transverse depressions on the cuticle of a nematode.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
An`nu·la'tion noun A circular or ringlike formation; a ring or belt.
Nicholson. Found on
http://www.encyclo.co.uk/webster/A/88
A circular or ringlike formation, as of the dermal scales on the tail of a mammal where one ring of scales that extends entirely around the tail is succeeded, posteriorly, by other rings.
Found on
https://www.utep.edu/leb/keys/glossary.htm
No exact match found.
