A hollow, usually spheroidal rock with crystals lining the inside wall.
A globular stone having a cavity lined with inward-growing crystals or layers of silica.
A small, hollow, usually rounded rock lined on the inside with inward-pointing crystals. Geodes form when mineral-rich water entering a cavity in a rock undergoes a sudden change in pressure or temperature, causing crystals to form from the solution and line the cavity's walls.
A family of X86-based microprocessors from AMD. Natively running Windows and Linux applications, the 32-bit Geode chips are used in embedded systems due to their low power requirements. The Geode was originally launched in 1999 by National Semiconductor, using a processor core from Cyrix after the two companies merged in 1997. In 2003, AMD acquired the Geode series. See x86 and AMD.