Meaning

noun a positively charged electrode by which electrons leave an electrical device

noun the negatively charged terminal of a voltaic cell or storage battery that supplies current

originFrom Ancient Greek ἀνα- (ana-, “up”) and ὁδός (hodós, “path”), forming the New Greek compound ἄνοδος (ánodos). Coined by English polymath William Whewell in 1834 for Michael Faraday, who introduced it later that year. By surface analysis, an- (“up, forward, away”) + -ode (“way”).

Etymology from Wiktionary, CC BY-SA 3.0