1. bulb - Noun
2. bulb - Verb
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; as, the bulb of the aorta.
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; to swell.
Source: Webster's dictionarythe bulb of a syringe Source: Internet
the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning Source: Internet
A 50-hour-life projection bulb, for instance, is designed to operate only convert below that melting point. Source: Internet
A cradle of reflectors is shaped and angled so that light emitted from the filament of an incandescent bulb will be thrown down the road in a way that maximizes driver visibility without blinding oncoming traffic. Source: Internet
According to diaries kept by the colonists, bulb onions were one of the first things planted by the Pilgrim fathers when they cleared the land for cropping. Source: Internet
A 25 W compact fluorescent light bulb puts out around 1700 lumens ; if that light is radiated equally in all directions, it will have an intensity of around 135 cd (135 lumens/steradian). Source: Internet