dosage

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Administration of a therapeutic agent in prescribed amounts.
2. n. Determination of the amount to be so administered.
3. n. The amount so administered.
4. n. Addition of an ingredient to a substance in a specific amount, especially to wine.

Century Dictionary and Cyclopedia

1. n. In medicine, the act or practice of administering medicine in doses; a course or method of dosing.
2. n. The operation of adding to wine, especially to sparkling wine, such as champagne, whatever is needful to give it an artificial distinctive character, as that of being dry or sweet, light or strong.

Wiktionary

1. n. The administration of a medication etc, in a measured amount; dosing
2. n. The addition of a small measured amount of a substance to something e.g. sugar to wine
3. n. The measured amount so administered or added; the dose

GNU Webster's 1913

1. n. (Med.) The administration of medicine in doses; specif., a scheme or system of grading doses of medicine according to age, etc.
2. n. The process of adding some ingredient, as to wine, to give flavor, character, or strength.
3. n. same as dose{1}
4. n. the quantity of a medicine or other substance given to an animal, expressed as a quantity per body weight
5. n. the quantity of radiation given to or absorbed by an object.

WordNet 3.0

1. n. a measured portion of medicine taken at any one time
2. n. the quantity of an active agent (substance or radiation) taken in or absorbed at any one time