Crossword solverSynonyms for auxin6 crossword answers for “auxin” (5), sorted by letter count.How many letters?All6311221511611713 letters 1IAA12 letters 2phytohormoneplant hormone(5,7)15 letters 1growth regulator(6,9)16 letters 1indoleacetic acid(12,4)17 letters 1indolebutyric acid(13,4)