A close up of a sweat bee.
The definition of a sweat bee is a small bee that nests in tunnels in the ground and is attracted to the salt in perspiration. The common name for this insect is often spelled "sweatbee." However, according to the Entomological Society of America (ESA) the correct common name of this insect is "sweat bee."
An example of a sweat bee is a bee that nests in a vertical tunnel in the ground.
any of a family (Halictidae) of small bees that usually nest in vertical tunnels in the ground: some species drink animal or human perspiration
Any of various small, ground-nesting bees of the family Halictidae that are attracted to the salt in perspiration.