The Collaborative International Dictionary of English v.0.48:
Shittim \Shit"tim\, Shittim wood \Shit"tim wood`\, n. The wood of the shittah tree. [1913 Webster]WordNet (r) 3.0 (2006):
shittim n 1: shrubby thorny deciduous tree of southeastern United States with white flowers and small black drupaceous fruit [syn: southern buckthorn, shittimwood, shittim, mock orange, Bumelia lycioides]