filament
/ˈfɪl.ə.mənt/noun
CEFR B1
Definition
A very thin wire or thread, especially the glowing part inside an old-style lightbulb.
Edison’s early lightbulbs famously used a carbonized bamboo filament.
Synonyms
thread
wire
A very thin wire or thread, especially the glowing part inside an old-style lightbulb.
Edison’s early lightbulbs famously used a carbonized bamboo filament.