tempeh /ˈtɛmpeɪ/ noun1 •An Indonesian food made from partially-cooked soybeans fermented by a fungus (either Rhizopus oligosporus or Rhizopus oryzae).Usually sporulation occurred when the tempeh had been exposed to air ( e.g. as the result of uncovering of the pan too frequently ) . — 1960 formstempehs