bulb

Bulb has 1 syllable.

noun. Electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity.

noun. Lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata).

noun. A modified bud consisting of a thickened globular underground stem serving as a reproductive structure.

noun. Anything with a round shape resembling a teardrop.