1. A positively charged electrode; such as, an electrolytic cell, storage battery, or electron tube: "The anode or terminal by which the current enters an electrolytic cell, voltaic cell, battery, etc."
2. Etymology: coined from Greek anodos, "way up", from ana, "up" + hodos, "way". Proposed by William Whewell and published by English chemist and physicist Michael Faraday (1791-1867). So called from the path the electrical current was thought to take.

William Whewell, May 24, 1794–March 6, 1866; was an English polymath, scientist, Anglican priest, philosopher, theologian, and historian of science.