rhizoverbBeta
Dictionarybulbelectric light
noun

bulb

BULB/bʌlb/

A light-producing component of an electric lamp.

The bulb glows in its socket.

A single clear incandescent light bulb glowing in a simple socket, with its rounded glass envelope and illuminated filament clearly visible.
Etymology
bulbGreekplant with a swollen underground stem

The plant’s rounded underground swelling supplied the image for a swelling in a glass tube. That shape-based extension gave the glass part of an electric lamp its name.

In context

ScienceABC II0:40
The incandescent bulb is made of two main components—the bulb and the filament. The bulb is typically crafted from glass and filled with a vacuum to extend its lifespan.
How Does a Light Bulb Work?

More examples

  • The bulb flickered and went dark.
  • She replaced the old bulb with an LED one.
  • The lamp takes a small bulb.

Forms

bulb · bulbs

bulbous adjective — rounded and swollen

Similar words

lamp
Can name the complete fixture rather than its replaceable light source.