| manna lichen | (n) any of several Old World partially crustaceous or shrubby lecanoras that roll up and are blown about over African and Arabian deserts and used as food by people and animals |
| manna lichen | n. Any of several Old World semicrustaceous or shrubby lecanoras that roll up and are blown about over African and Arabian deserts and used as food by people and animals; same as manna{ 2 }. [ WordNet 1.5 ] |