Wiktionary
bee smoker
n. (context apiculture English) A device that releases smoke intended to distract bees.
Wikipedia
Bee smoker
A bee smoker (usually called simply a smoker) is a device used in beekeeping to calm honey bees. It is designed to generate smoke from the smouldering of various fuels, hence the name.
Usage examples of "bee smoker".
Her face was protected by a net, and in one gloved hand she held a bee smoker, with a small bellows attachment.