beefwood: any of several heavy hard reddish chiefly tropical woods of the families Casuarinaceae and Proteaceae; some used for cabinetwork
wood: the hard fibrous lignified substance under the bark of trees
organophosphate nerve agent: any of a series of nerve agents containing organophosphate compounds first synthesized by German chemists in 1936; in World War II the Germans tested them in concentration camps but not on the battlefield; Iraq is alleged to have used them against Iran and against the Kurds