Bulbus may refer to:

Anatomy

A bulb-shaped anatomical structure, including: *''bulbus'', an archaic term for the medulla oblongata, as used for example in the term corticobulbar tract *Bulbus arteriosus *Bulbus cordis *Bulbus duodeni *Bulbus glandis *Bulbus oculi *Bulbus olfactorius *Bulbus penis *Bulbus pili *Bulbus urethrae *Bulbus vestibuli vaginae

Other

*Bulbus (gastropod), ''Bulbus'' (gastropod), a genus of predatory sea snails *Bulbus fritillariae cirrhosae, from ''Fritillaria'' plants {{dab