- a usually subterranean and often globular bud having fleshy leaves emergent at the top and a stem reduced to a flat disk, rooting from the underside, as in the onion and lily.
- a plant growing from such a bud.
- the glass housing, in which a partial vacuum has been established, that contains the filament of an incandescent electric lamp.
- an incandescent or fluorescent electric lamp.
Origin of bulb
Examples from the Web for bulb
So, at the Home Depot in Connecticut, a 40-watt bulb costs $4.97, and a 60-watt bulb costs $6.97.
In 25,000 hours a regular 75-watt bulb would use $262.50 of electricity.
The 40-watt bulb costs $9.97 and the 60-watt bulb retails for $12.97.
Specifically, the law said a bulb should provide 100 watts of brightness while using 72 watts or less.The Best Green Idea in Obama’s Climate-Change Speech|Daniel Gross|June 25, 2013|DAILY BEAST
By May, its bulb can grow as big as two centimeters, and turns pink and then a deep red as it matures.
Allow the bulb and tube to cool, then repeat the heating once more.A Handbook of Laboratory Glass-Blowing|Bernard D. Bolas
He clasped the bulb again and again threw it dramatically away.The Regent|E. Arnold Bennett
When a bulb is not of a sufficiently regular form, it may sometimes be re-made by re-collecting the glass, and re-blowing it.
The bulb, however, did not always change hands, often serving merely as a gambling basis; it even may not have existed at all.A Wanderer in Holland|E. V. Lucas
Lamps that waste electricity are those which have (bad wiring) (frayed cords) (dirty shades or bulb).Electricity for the 4-H Scientist|Eric B. Wilson
British Dictionary definitions for bulb
Word Origin for bulb
Word Origin and History for bulb
1560s, "an onion," from Middle French bulbe (15c.), from Latin bulbus "bulb, bulbous root, onion," from Greek bolbos "plant with round swelling on underground stem." Expanded by 1800 to "swelling in a glass tube" (thermometer bulb, light bulb, etc.).