Or"ach, 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.
© Webster 1913.