What is "manna croup"

Manna croup \Man"na croup`\ (m[a^]n"n[.a] kr[=oo]p`). [Manna + Russ. & Pol. krupa groats, grits.]

1. The portions of hard wheat kernels not ground into flour by the millstones: a kind of semolina prepared in Russia and used for puddings, soups, etc. -- called also manna groats.

2. The husked grains of manna grass.

n. 1 The portions of hard wheat kernels not ground into flour by the millstones: a kind of semolina prepared in Russia and used for puddings, soups, etc. 2 The husked grains of manna grass.