Orach,
n. [F.
arroche, corrupted fr. L.
atriplex, Gr. . Cf.
Arrach.].
A genus (Atriplex) of herbs or low shrubs of the Goosefoot family, most of them with a mealy surface. [1913 Webster]
Garden orache,
a plant (Atriplex hortensis), often used as a pot herb; -- also called mountain spinach.