ration Look up ration at Dictionary.com
1550, "reasoning," later, "relation of one number to another" (1666), then "fixed allowance of food" (1702, often rations, from Fr. ration), from L. rationem (nom. ratio) "reckoning, calculation, proportion" (see ratio). The verb meaning "put (someone) on a fixed allowance" is recorded from 1859; sense of "apportion in fixed amounts" is from 1870. The military pronunciation (rhymes with fashion) took over from the preferred civilian pronunciation (rhymes with nation) during World War I. Rationing is from 1918, from conditions in England during the war.