Look up Dose, Dosis, dosage, doses, or dosis in Wiktionary, the free dictionary. Dose means quantity (in units of energy/mass) in the fields of nutrition, medicine, and toxicology.Dosage is the rate of application of a dose but in common parlance it is used as a synonym for the term dose.ook up Dose, Dosis, dosage, doses, or dosis in Wiktionary, the free dictionary. Dose means quantity (in units of energy/mass) in the fields of nutrition, medicine, and toxicology.