mason beemason bee
a solitary bee (Osmia cobaltina) that builds its nest of clay, sand, mud, etc.
Any of various solitary bees of the family Megachilidae that build nests from mud, chewed leaves, or resin.
(plural mason bees)
- (zoology) Any of the bees of the genus Osmia, which have the habit of making compartments of mud in their nests.