ETYM Latin bulbus, Greek bolbos: cf. French bulbe.
1. A modified bud consisting of a thickened globular underground stem serving as a reproductive structure.
2. A rounded dilation or expansion in a canal or vessel or organ.
3. A rounded part of a cylindrical instrument (usually at one end).
Underground bud with fleshy leaves containing a reserve food supply and with roots growing from its base. Bulbs function in vegetative reproduction and are characteristic of many monocotyledonous plants such as the daffodil, snowdrop, and onion. Bulbs are grown on a commercial scale in temperate countries, such as England and the Netherlands. + prikaži više

A glass bulb containing a wire filament (usually tungsten) that emits light when heated; SYN. lightbulb, bulb, incandescent lamp, electric light, electric-light bulb.
Incandescent filament lamp, first demonstrated by Joseph Swan in the UK 1878 and Thomas Edison in the US 1879. The present-day light bulb is a thin glass bulb filled with an inert mixture of nitrogen and argon gas. It contains a filament made of fine tungsten wire. When electricity is passed through the wire, it glows white hot, producing light. + prikaži više