K rationn. [ < the initial letter of the surname of Ancel Keys (1904–), American physiologist] a package of concentrated food.
ΚΠ
1944 R.A.F. Jrnl. Aug. 283 We get American ‘K’ rations, with a few extras.
1967 ‘T. Carew’Korea ii. 19 A K ration consisted of a tin of compressed meat hash, coffee, powdered milk, a fruit bar, cigarettes, chewing gum, and toilet paper.