Legal use of '-in-law'?

A lawyer's nameplate in a posh locality of Chennai reads
Mr...
SENIOR LECTURER-IN-LAW
Govt Law College

I wonder if he has law students or students-in-law in his class...

What is the origin of '-in-law'? One Google result says 'When you form a JV with your spouse, her (his) mother is your mother - by law!'

Popular posts from this blog

The Power of Vishnu Sahasranamam- Vani's rebirth

"Did Hanuman return the mountain?"

Inner Kora - Just a FYI