Wiktionary
n. (context commerce English) A supply chain which is temperature-controlled, important for the supply of certain foods or pharmaceuticals.
Wikipedia
A cold chain is a temperature-controlled supply chain. An unbroken cold chain is an uninterrupted series of storage and distribution activities which maintain a given temperature range. It is used to help extend and ensure the shelf life of products such as fresh agricultural produce, seafood, frozen food, photographic film, chemicals, and pharmaceutical drugs. Such products, during transport and when in transient storage, are called cool cargo. Unlike other goods or merchandise, cold chain goods are perishable and always en route towards end use or destination, even when held temporarily in cold stores and hence commonly referred to as cargo during its entire logistics cycle.
Usage examples of "cold chain".
Unconsciously, he raised one gloved hand to his face, the cold chain mail tracing the line of the scar that ran down the exposed right cheek to his chin.
The star limped and hobbled and stumbled, and Tristran walked beside her, cold chain binding wrist to wrist.
He hooks the cold chain to Vike's collar and hurries back inside before the husky realizes that, instead of exercise, he has only another long stretch of tethered boredom ahead of him.