strat·o·vol·ca·no 
(străt′ō-vŏl-kānō, strā′tō-)
(străt′ō-vŏl-kānō, strā′tō-)n. pl. strat·o·vol·ca·nos
A volcano composed of steep, alternating layers of lava and pyroclastic material, such as ash. Also called composite volcano.
[STRAT(UM) + VOLCANO.]