lanas noun English. One of the smallest varieties of native bamboo, 2 cm. in dia., 10 m. tall, having roughly l m. spaces between nodes, oft. used as a repellent against lelanug (About five pieces are stuck in ground around edge of field.) Example sentence: Subanen. Sa' mpeditua Titik, alapag lanas, bulung ta di palay ta kini mimatay. English. If you have to go to Titik, get some pieces of lanas bamboo for us to treat this rice of ours that's dying. Generic. bulung c.f. beletakan