Webster's Revised Unabridged Dictionary · 1913

Manna croup

Manna croup (man"nȧ krop`)

[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.