CLD

• Cholesterol-lowering drug
• Chronic liver disease
• Chronic lung disease
• Chronic lifestyle disease

• 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)

• 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
• The Commercial LEO Destinations program, a NASA project to support private businesses building in low Earth orbit
• Chaldean Neo-Aramaic (language), in ISO 639-3 code (list of all codes beginning with "c")
• {{mono|cld}}, the clear direction flag instruction on x86 compatible CPUs, opposite of {{mono|std}}
• CLD chromophore in organic chemistry and polymeric nonlinear optics
• CLD player, a series of Laserdisc players with CD playback from Pioneer{{cn|date=October 2021}}
• 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 programmable logic device (PLD)
• Constrained-layer damping, a mechanical engineering technique for suppression of vibration
• Current limiting diode, otherwise known as constant current diode in electronics

• Charles Lutwidge Dodgson, the pen name of Lewis Carroll

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