A queen excluder is a tool used in beekeeping to help manage hives. It's designed to keep the queen bee out of certain parts of the hive, so that the bees can focus on producing honey and not distracted with laying eggs. There are a few different synonyms for the queen excluder that you may come across in beekeeping circles. One is a "honey excluder," which is a more accurate term for what the tool does. Other synonyms include "bee excluder," "queen guard," and "grid excluder." All of these terms refer to the same basic tool that is used to restrict the movement of the queen bee in the hive.