How many letters does the top answer for “a combining form indicating ferric iron as an ingredient; as, ferricyanide.” have?

The most common answer is ferri (5 letters).

Crossword clue: a combining form indicating ferric iron as an ingredient; as, ferricyanide.

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

ferri 5 letters web-def

A combining form indicating ferric iron as an ingredient; as, ferricyanide.