CLD may refer to: Medicine Cholesterol-lowering drug Chronic liver disease Chronic lung disease Transport Chelsfield railway station in Orpington, London (National Rail station code: CLD) ChairLift Detachable, a classification of a Detachable chairlift McClellan–Palomar Airport in CarLsbaD, California (IATA Code: CLD) Science and technology Causal loop diagram for modeling dynamic systems The Center for Life Detection, a NASA-supported collaboration of researchers in the science of detecting life beyond the Earth Chaldean Neo-Aramaic (language), in ISO 639-3 code (list of all codes beginning with "c") , the clear direction flag instruction on x86 compatible CPUs, opposite of CLD chromophore in organic chemistry and polymeric nonlinear optics CLD player, a series of Laserdisc players with CD playback from Pioneer Color layout descriptor, a summary used in digital image processing to capture the spatial distribution of color in an image Command Definition Language, for defining commands for use with DIGITAL Command Language Configurable Logic Device, synonym for PLD Constrained-layer damping, a mechanical engineering technique for suppression of vibration Current limiting diode, otherwise known as constant current diode in electronics Other Charles Lutwidge Dodgson, the pen name of Lewis Carroll