Function: noun
Date: 1935
: an organic substance other than a nutrient that in minute amounts modifies a plant physiological process especially : one produced by a plant and active elsewhere than at the site of production
Function: noun
Date: 1935
: an organic substance other than a nutrient that in minute amounts modifies a plant physiological process especially : one produced by a plant and active elsewhere than at the site of production
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012