[Grammar] Passive voice in a question or relative clause

[kasamb]

Hello,

For example I ask somebody "What is meant by a Perpetuum mobile?"
So how would the question look as a clause, say "Could you tell me, what is meant by a Perpetuum mobile?" or "Could you tell me, what meant is by a Perpetuum mobile?"

 

[Matthew Wai]

Exactly the same question has already been answered on http://forum.wordreference.com/showthread.php?t=2910584

Not a teacher.