Answer: kinin

AnswerCrossword Clue
kininany of a class of plant hormones, produced by the roots and traveling upward through the xylem, that promote tissue growth and budding and, on application, retard plant senescence
kinina hormone (a secretion of the endocrine organs)
kininany of a group of hormones, formed in body tissues, that cause dilation of blood vessels and influence capillary permeability