Wiktionary
n. A sound recording device most commonly used to record speech for later playback or to be typed into print.
Wikipedia
A dictation machine is a sound recording device most commonly used to record speech for later playback or to be typed into print. It includes digital voice recorders and tape recorders.
The name " Dictaphone" is a trademark of the company of the same name, but has also become a common term for all dictation machines, as a genericized trademark.
Usage examples of "dictation machine".
Unlocking the bottom drawer of his desk, Arnie got out the little battery-powered encoding dictation machine and set it up for use.
She detached herself from her dictation machine and headed for the files.
I went to fetch the small IBM dictation machine that I carry around in my Samsonite, checked that it was working, and laid it on the table between us.
In it was his small dictation machine, his sub-notebook computer (which would soon be replaced by the mother of all computers), his camera, that great cell phone, his toiletries, and two changes of clothing.
Mark wasn't sure if he meant he was composing it for them to hear or that he was composing the music on their behalf, like some kind of cetacean dictation machine.
He went downstairs to the office, rested his white shoes on his desk, turned on his dictation machine to begin his report, and frowned as the roar of an engine passed so close it shook the window behind him.
A dictation machine, perhaps, akin to the phonograph but much smaller.