imitation rice; artificial rice
Refers to rice-like products made from other grains, starches, or synthetic materials, often used as a substitute or extender.
戦時中は人造米が配給された。
During the war, imitation rice was distributed.
代用食 is a broader term for substitute foods in general, while 人造米 specifically refers to imitation rice.
Compound of 人造 (artificial, man-made) and 米 (rice).