Microphonograph

Wikipedia does not have an article on "microphonograph", but its sister project Wiktionary does:

Read the Wiktionary entry "microphonograph"

You can also:

Search for Microphonograph in Wikipedia to check for alternative titles or spellings.

Start the Microphonograph article, using the Article Wizard if you wish, or create a request for it; but please remember that Wikipedia is not a dictionary.