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bee, (superfamily Apoidea), any of more than 20,000 species of insects in the suborder Apocrita (order Hymenoptera), including the familiar honeybee (Apis) and bumblebee (Bombus) as well as thousands more wasplike and flylike bees. Adults range in size from about 2 mm to 4 cm (about 0.08–1.6 inches). Bees are closely related to certain types of wasps, the principal biological difference between them being that bees (except for parasitic cuckoo bees) provide their young with...