If I go along the definitions in What is the difference between a connector, jack, plug, and port?:
The plug is part of a cable that connects to a port. The plug always connects to something else (e.g., a jack or port).
A jack is similar to a port and is a hole or other connection that allows a compatible plug to be connected to the jack.
... then in this image (found here via image search):
... I'd call the things on the left DC (barrel) plugs (or "male" connectors) - and the things on the right would be DC (barrel) jacks (or "female" connectors). Would this be a correct nomenclature (even if I'm aware conventions like these are not strictly followed in the market)?
That being said, I'm aware there is a schematic symbol for DC (barrel) jacks - like this one, taken from Deciphering a DC jack schematic:
My question is: is there a schematic symbol specifically for DC (barrel) plugs, and if so, what does it look like?