RhymeZone: bulbs definitions

Definitions of bulb:

noun: a rounded part of a cylindrical instrument (usually at one end)
Example: "The bulb of a syringe"
noun: a rounded dilation or expansion in a canal or vessel or organ
noun: a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
noun: electric lamp consisting of a glass bulb containing a wire filament (usually tungsten) that emits light when heated
noun: lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata)