What is "mountain spinach"

Orach \Or"ach\, Orache \Or"ache\, n. [F. arroche, corrupted fr. L. atriplex, Gr. ?. Cf. Arrach.] (Bot.) A genus ( Atriplex) of herbs or low shrubs of the Goosefoot family, most of them with a mealy surface.

Garden orache, a plant ( Atriplex hortensis), often used as a pot herb; -- also called mountain spinach.

n. The orach (''Atriplex hortensis'').

n. Asiatic plant resembling spinach often used as a potherb; naturalized in Europe and North America [syn: garden orache, Atriplex hortensis]