
1) Ester
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https://www.crosswordclues.com/clue/cyanate

1) Ester of an acid 2) Salt of a strong acid
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https://www.crosswordclues.com/clue/cyanate

The cyanate ion is an anion with the chemical formula written as [OCN]− or [NCO]−. In aqueous solution it acts as a base, forming isocyanic acid, HNCO. The cyanate ion is an ambidentate ligand, forming complexes with a metal ion in which either the nitrogen or oxygen atom may be the electron-pair donor. It can also act as a bridging ligand. Or...
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http://en.wikipedia.org/wiki/Cyanate

• (n.) A salt of cyanic acid.
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http://thinkexist.com/dictionary/meaning/cyanate/

The radical -O-C≡N or ion (CNO)-. ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973

Cy'a·nate noun [ Confer French cuanate . See Cyanic .] (Chemistry) A salt of cyanic acid. Ammonium cyanate (Chemistry) , a remarkable white crystalline substance, NH 4 .O.CN, which passes, on standing, to the organic compound, urea, CO.(NH 2
Found on
http://www.encyclo.co.uk/webster/C/208

Type: Term Pronunciation: sī′a-nāt Definitions: 1. The radical —O—CΞN or ion (CNO)−.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=22134

A cyanate is a salt of cyanic acid.
Found on
http://www.probertencyclopaedia.com/browse/GC.HTM

a salt or ester of cyanic acid.
Found on
https://www.infoplease.com/dictionary/cyanate
No exact match found.