superhive

from The Century Dictionary.

• noun An upper compartment of a beehive, removable at pleasure.

from the GNU version of the Collaborative International Dictionary of English.

• noun A removable upper part of a hive. The word is sometimes contracted to super.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun beekeeping An empty box placed above the existing boxes of the beehive in order to allow the colony to expand or store additional honey.