Definition
On an aromatic ring, the C4 position.
Explanation
The interactions between two benzene rings where substituents are separated by 2 carbons. the relationships between two benzene rings are called para, ortho, or meta.
Para
In one sentence
The interactions between two benzene rings where substituents are separated by 2 carbons. the relationships between two benzene rings are called para, ortho, or meta.
Terms used on this page
Every one of these links to a full definition with an example.