mason bee

noun

any of numerous solitary bees, as of the family Megachilidae, that construct nests of clay.

Origin

1765-75

Examples from the web for mason bee

It is also known as the orchard mason bee, because it uses mud to build its nests.
It is also known as the orchard mason bee because it uses mud to build its nests.

British Dictionary definitions for mason bee

noun

any bee of the family Megachilidae that builds a hard domelike nest of sand, clay, etc, held together with saliva