How many letters does the top answer for “a body which passes to the positive pole in electrolysis.” have?

The most common answer is electronegative (15 letters).

Crossword clue: a body which passes to the positive pole in electrolysis.

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

electronegative 15 letters web-def

having a negative charge