How can the term "terminal" be defined
Is't just "the physical end of the component "
Or there is a more rigorous definition
hi there .. no so much of a component say a transistor, resistor, capacitor ( tho some do have their own nut/screw terminations)
I view a terminal as a termination point. be it a screw terminal, a solder point for multiple components and or wires
I personally wouldn't call the wire end of a component a terminal
eg
but I would deem that these stud mounted diodes as having terminals in the true sense of the word
eg
these are TERMINAL blocks
egand a zillion variations like them
I think you will find it very open to interpretation
Electrical Terminals are usually devices for connecting wires to electrical devices (PCBs, Motors or some components) or other wires (as in junction boxes). I've never heard them defined as the "physical end of a component" as you can have electrical terminals in the middle.
Spade Terminals on a relay..
http://static.rapidonline.com/catalogueimages/Module/M553902P01WM.jpg
Battery post Terminals https://i.ytimg.com/vi/dXMGy9iX-s8/maxresdefault.jpg
Motor Terminals
http://i1076.photobucket.com/albums/w448/4wdadventurers/Winch%20Gear/Winchwiring001_zpsf9e32eb2.jpg
Junction box terminals
http://www.sparksdirect.co.uk/blog/wp-content/uploads/2011/08/junction-box-tr1.jpg
Buss Bar Terminals (eg Ground) http://www.suns-usa.com/pictures/G12806.jpg
Maybe the term terminal comes from the early power and telephone networks.
The terminal connection is at the end of the line, because that is where the line terminates.
Wire splices along the line are not terminals, they are joints or junctions.