shittimwood n deciduous tree of southeastern United States and Mexico n shrubby thorny deciduous tree of southeastern United States with white flowers and small black drupaceous fruit n wood of the shittah tree used to make the ark of the Hebrew Tabernacle Synonym(s) false buckthorn chittamwood chittimwood black haw Bumelia lanuginosa southern buckthorn shittim mock orange Bumelia lycioides