Meaning of BULB in English

BULB

n.1 a an underground fleshy-leaved storage organ of some plants (e.g. lily, onion) sending roots downwards and leaves upwards. b a plant grown from this, e.g. a daffodil.

2 light-bulb (see LIGHT(1)).

3 any object or part shaped like a bulb.

Etymology: L bulbus f. Gk bolbos onion

Oxford English vocab.      Оксфордский английский словарь.