Meaning of BULB in English

BULB

bulb /bʌlb/ BrE AmE noun [countable]

[ Date: 1500-1600 ; Language: Latin ; Origin: bulbus , from Greek bolbos 'plant with a bulb' ]

1 . the glass part of an electric light, that the light shines from SYN light bulb :

a 100-watt bulb

2 . a root shaped like a ball that grows into a flower or plant:

tulip bulbs

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.