withholding period(для ветеринарных препаратов (напр., после применения антибиотиков, указывается период ожидания по мясу и молоку – количество суток) Vitaly Lavrov)
withdrawal period(Withdrawal periods reflect the amount of time necessary for an animal to metabolize an administered product and the amount of time necessary for the product concentration level in the tissues to decrease to a safe, acceptable level. Every federally approved drug or animal health product has a withdrawal period printed on the product label or package insert. Oksana)