転炉 てんろ noun (common) (futsuumeishi) 転炉てんろ Noun English JMdict 1 noun (common) (futsuumeishi) converter (used in refining);rotary kiln 漢字 kanji used 転 revolve, turn around 11画 · JLPT N 3 炉 hearth, furnace 8画 · JLPT N 1