dim-bulb: Word of the day for December 18, 2018

Our new 'Word Of The Day' article update : dim-bulb , adj :
Slow-witted, stupid. On this day 140 years ago in 1878, English chemist, physicist and inventor Sir Joseph Swan first publicly demonstrated his incandescent carbon lamp, one of the earliest light bulbs, at a lecture for the Newcastle upon Tyne Chemical Society.