royal jelly 
noun [mass noun]
A substance secreted by honeybee workers and fed by them to larvae which are being raised as potential queen bees.Produced by glands in worker bees' heads, royal jelly is fed to larvae and the adult queen bee....
- Only the queen larvae are continually fed royal jelly.
- Apart from honey, they produce beeswax, propolis, royal jelly and bee pollen, all of which have significant medicinal and cosmetic applications.