/in"dohl euh see"tik, -set"ik, in'-/ , Biochem.
a crystalline, water-insoluble powder, C 10 H 9 NO 2 , a natural plant hormone, used esp. for stimulating growth and root formation in plant cutting. Also called beta-indoleacetic acid, heteroauxin .
[ 1885-90; INDOLE + ACETIC ]