bulb
noun
1. a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
Definition categories: plant, stalk, stem
2. electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity
Similar word(s): lightbulb
Definition categories: man–made
3. a rounded part of a cylindrical instrument (usually at one end)
- the bulb of a syringe
Definition categories: man–made, part, portion
4. anything with a round shape resembling a teardrop
Definition categories: shape
5. lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata)
Similar word(s): medulla
Definition categories: body
6. a rounded dilation or expansion in a canal or vessel or organ
Definition categories: body, structure
Sentences with bulb as a noun:
- the bulb of the aorta
verb
1. (intransitive) To take the shape of a bulb; to swell.