† metameconaten.
Origin: A borrowing from French. Etymon: French métaméconate.
Etymology:  <  French métaméconate (A. G. Vallet 1834, in  Jrnl. de pharm. 21 24)  <  méta  meta- prefix   + méconate  meconate n.
 Chemistry. 
Obsolete.
1836    W. T. Brande  		(ed. 4)	 1022  				The neutral metameconates of ammonia and potassa.
 This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2019).