davy

name

1. A diminutive of the male given name David.

   “Tell him, I'll knock his leek about his pate Upon Saint Davy's day.”

2. A surname originating as a patronymic derived from David.

noun

1. A Davy lamp.

   “[…] the experience of more than one of the best-regulated collieries of the north of England, where a vast number of Davies are in daily use.”

2. An affidavit, a legally binding statement or oath

   “Rather than testify in open court, each sailor posted a davy before sailing off.”

   “"You and me should get on well, Hawkins, for I'll take my davy I should be rated ship's boy."”

3. A Davy lamp, a type of safety lamp.

   “The miner knew the old davy was safer than any open flame, but far riskier than a modern flashlight.”

   “He also developed the innovative davy lamp for use in coal mines.”