-onic
Word Origin
1 
a suffix used in forming names of acids, especially carboxylic acids obtained by oxidation of aldoses:
gluconic acid.
Origin
perhaps generalized from lactonic acid as translation of German Lactonsäure; see lactose, -one, -ic
Related Words
- arachidonic acid
- ethephon
- gluconic acid
- trichlorfon
ORIGIN: from -one -ic glycur)onic 
-on·ic
\|änik, -nēk\  adjective suffix 
Etymology: International Scientific Vocabulary, from -onic (in gluconic acid) 
 : containing carboxyl especially when formed by oxidizing the aldehyde group of an aldose sugar 
< aldonic acid >
< hexonic acid >
< lactonic >
< aldonic acid >
< hexonic acid >
< lactonic >