Screw-in

Full definition of screw-in

Adjective

1. Able to be screwed into a threaded hole.
• 2007-03-01, Matthew L. Wald, Room to Improve, Rather than burning out as incandescent bulbs do, L.E.D.’s light output dims over tens of thousands of hours. L.E.D.’s are also more resistant to vibration than incandescents or screw-in fluorescent bulbs, and do not flicker or hum.