Dear Hasrsha,

There are several efforts toward systemization of the terminology, but
no single ontology so far.

You might find useful the following links:

        * IUPAC glossary of terms used in toxicology
          http://sis.nlm.nih.gov/enviro/iupacglossary/frontmatter.html
        * Set of biomedical ontologies http://www.ebi.ac.uk/ontology-lookup/
        * NTP Pathology Table Codes http://jones.niehs.nih.gov:8080/pct/

Best regards,
Nina

Harsha Gurulingappa wrote:
> Hello All;
>
> I am working in the area of Text Mining. I like to know if there is any
> well established source for toxicity terminology (I mean a dictionary or
> thesaurus of terms used in toxicology).
>
> Thanks in advance
>