betty-lamp

Noun

Betty lamp (plural Betty lamps)

1. (historical) A lamp consisting of a shallow lidded metal vessel with a small spout for a coarse wick, fueled by tallow, grease, or oil, usually hung by a hook and chain, and used especially in the American colonies.
   • You, who have more or less trouble with your rush lights, cannot fancy how luxurious it is to have one of these betty-lamps, which costs in care no more than is required to fill them with grease or oil.1910, James Otis, Ruth of Boston