The same as the plural of shittah; acacia trees; Shittim, a place East of the Jordan -- Shittim.
see HEBREW shittah
H7851. Shittim
שִׁטִּים proper name, of a location always ׳הַשּׁ; usually Σαττειν:
1 East of Jordan, Joshua 2:1; 3:1 (E), Micah 6:5; Numbers 25:1 (P); = הַשּׁ ׳אָבֵל 33:49; on exact site see BuhlG 116 Gray25:1.
2 הַשּׁ ׳נַחַל Joel 4:18 (perhaps Wady es-San‰, west of Jerusalem, compare We BuhlGeogr. 90, and views in Dr).