(informal) A person who is slow-witted or stupid.

Slow-witted, stupid.

plural of lamp bulb

(dated, technical) Light bulb.

an arrangement by which a sidewalk is extended outwards for a bus stop

plural of hot bulb

a type of lightbulb that mimics the appearance of bulbs and filaments and light produced by early light bulbs of Edison General Electric during the introductory period of electric lighting

plural of Edison bulb

(anatomy) The enlarged proximal part of the corpus spongiosum.

plural of urethral bulb