ration

(noun) the food allowance for one day (especially for service personnel). Example: "The rations should be nutritionally balanced."

(noun) a fixed portion that is allotted (especially in times of scarcity).

(verb) restrict the consumption of a relatively scarce commodity, as during war. Example: "Bread was rationed during the siege of the city."

(verb) distribute in rations, as in the army. Synonyms: ration out. Example: "Cigarettes are rationed."