STABILIZER

[sta.bi.liz.er] n (ca. 1909): one that stabilizes something: as a: a substance added to another substance (as an explosive or plastic) or to a system (as an emulsion) to prevent or retard an unwanted alteration of physical state b: a gyroscope device to keep ships steady in a heavy sea c: an airfoil providing stability for an airplane; specif: the fixed horizontal member of the tail assembly--see airplane illustration