Yes, both groin and quoin are wedges.. one can be a anatomical, (groin area)-- quoins are corner blocks-- wedges of different sort, joining two walls..

coin joins in from the kind of wedge shaped "presses" used to create coins-- the money..

and the latin root of cuneus... (wedge) also show up in anatomical words.. and cuniform as Dr. bill pointed out.


my other obsession