bulb

• a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
• electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity
• a rounded part of a cylindrical instrument (usually at one end)
• anything with a round shape resembling a teardrop
• lower or hindmost part of the brain
• a rounded dilation or expansion in a canal or vessel or organ
• A spheroidal body growing from a plant either above or below the ground (usually below), which is strictly a bud, consisting of a cluster of partially developed leaves, and producing, as it grows, a stem above, and roots below, as in the onion, tulip, etc. It differs from a corm in not being solid
• A name given to some parts that resemble in shape certain bulbous roots
• An expansion or protuberance on a stem or tube, as the bulb of a thermometer, which may be of any form, as spherical, cylindrical, curved, etc
• To take the shape of a bulb

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