noun. A relatively rare yellow, brown, or black mineral, CaTiO₃, sometimes also containing rare-earth elements, such as lanthanum.

noun. Any of various oxides having a crystal structure similar to that of this mineral and that can be found in many superconducting ceramic materials and in electrodes in fuel cells.

noun. A titanate of calcium, occurring in crystals of isometric form (though perhaps through pseudosymmetry), and having a yellow to black color.

noun. A minor accessory mineral, CaTiO3, occurring in basic rocks, as orthorhombic crystals.

"An alternative material, known as perovskite, is far less expensive than platinum and may do the job more effectively, engineers from the research arm of General Motors report in the March 26 Science."

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