Webster's Revised Unabridged Dictionary · 1913

Orach

Orach , noun

[French arroche, corrupted from Latin atriplex, Greek {not transcribed}. Compare Arrach.]

(Botany) A genus (Atriplex) of herbs or low shrubs of the Goosefoot family, most of them with a mealy surface.
Collocations (1)
Garden orache , a plant (Atriplex hortensis), often used as a pot herb; -- also called mountain spinach.

Also: Orache