Any of a group of acids which are dicarboxylic acid derivatives of thiazolidine and are produced when penicillins are hydrolysed (as by a penicillinase) and the carbon–nitrogen bond of the lactam ring is broken.
Origin
1940s; earliest use found in Science.
Definition of penicilloic acid in US English:
penicilloic acid
noun
Biochemistry
Any of a group of acids which are dicarboxylic acid derivatives of thiazolidine and are produced when penicillins are hydrolysed (as by a penicillinase) and the carbon–nitrogen bond of the lactam ring is broken.