Analog-Digital: Analog hands combined with a digital LCD display.

Carbon Core Guard: A new type of G-Shock structure with a carbon fiber reinforced resin case, which results in thinner and lighter designs.

DLC: Refers to “diamond-like carbon” coating, a deluxe scratch-resistant treatment that is superior to ion plating.

EL Backlight: Electro-luminescent backlight that illuminates the entire background of the digital display.

Full Auto Light: Can be set to activate with a turn of the wrist when viewing the watch, and will only activate in the dark. An “auto light” (not “full auto”) will activate in light and dark settings.

Inverted LCD Display: An inverted digital display with a black or dark background and lighter digits. Also known as a “negative” or “reverse” display.

Ion Plating (IP): A physical vapor deposition process used to produce colors on stainless steel parts.

MIP LCD: Memory in Pixel display, a power-saving and high-contrast pixel display used in certain advanced G-Shock models with Bluetooth.

Multi-Band 6: A feature that automatically syncs the watch time with atomic clocks through the reception of radio waves from six transmitters worldwide. The transmitters are located in Japan (Fukushima and Kyushu), North America, England, Germany, and China. Also known as Multiband 6, Wave Ceptor, radio-powered, and radio-controlled. It is sometimes referred to as “atomic” timekeeping since it syncs the time with atomic clocks.

Multi-Function Alarm: The multi-function alarm on certain models can be set for the following types: daily, date (time at specific date), 1-month (time daily during the month set), monthly (time on specific numbered day every month). The multi-function alarm is found on certain models like the DW-5600, DW-6900, and DW-9052 and should not be confused with the “daily alarm” on other models.

Neon Illuminator: Uses a UV-A (blacklight) LED to illuminate phosphorous-coated hands and markers vividly in the dark. More common on Pro Trek watches than G-Shock.

Sapphire: A type of display glass that offers superior scratch resistance than the standard mineral glass.

STN LCD Display: Super-twisted nematic LCD display that provides better contrast and viewing over regular LCD displays.

Super Illuminator: A bright LED light.

Tough Movement: An analog movement featuring Tough Solar power, Multi-Band 6 automatic radio time syncing, a hybrid mount structure for enhanced durability and resistance to g-forces, and an hourly automatic needle correction function. Generally, G-Shock and Pro Trek watches with three analog hands, Tough Solar, and Multi-Band 6 are Tough Movement models.

Tough Solar: Casio’s solar watch technology that uses solar panels on the display and a rechargeable battery, capable of charging from the sun and indoor lighting. Features a large capacity rechargeable battery and a power save function.

Triple G Resist: Resistance to shock, centrifugal gravity (g-forces), and heavy vibration.

Triple Sensor: Environmental sensors including a pressure sensor (altimeter and barometer), compass, and thermometer. The Triple Sensor on the Frogman GWF-D1000 includes a water depth sensor in place of the pressure sensor.

Twin Sensor: Compass and thermometer.