Yes. Create a .desktop file and force the system to re-index all .desktop files. No clue how to accomplish that. Might just be able to place the .desktop file in the same directory as all the other .desktop files? IDK.
Probably don't want to put this file into any "autostart" directory.
Code:
$ locate .desktop |grep xterm
Found existing xterm .desktop files.
/usr/share/applications/debian-uxterm.desktop
/usr/share/applications/debian-xterm.desktop
/usr/share/mate/applications/debian-uxterm.desktop
/usr/share/mate/applications/debian-xterm.desktop
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