is it acceptable to put questions of the type "what does ... mean?" or "what is ...?" on MathOverflow. For example?

• what is the moduli space of higgs bundles?
• what is a Picard-Viessot extension?
• what is a Borel subgroup?
• what is the Kontsevich-Zorich cocycle?
• ...
• etc

There are many examples of literature where the jargon is so specific I have no idea what they are talking about. Perhaps it's time to contact the author?