{ } n. [ OF. espinache, espinoche, F. épinard; cf. F. spinace, Sp. espinaca; all fr. Ar. isfānāj, isfināj, aspanākh, probably of Persian origin. ] (Bot.) A common pot herb (Spinacia oleracea) belonging to the Goosefoot family. [ 1913 Webster ]

Mountain spinach. See Garden orache, under Orache. --
New Zealand spinach (Bot.), a coarse herb (Tetragonia expansa), a poor substitute for spinach. [ 1913 Webster ]

☞ Various other pot herbs are locally called spinach. [ 1913 Webster ]