CCK

CCK is an acronym that can refer to several distinct concepts in science and technology. The two most common uses are cholecystokinin, a peptide hormone, and the Content Construction Kit in Drupal, a popular content-management add-on.

Cholecystokinin (CCK) is produced mainly by I cells in the duodenum and jejunum. It stimulates the secretion of pancreatic enzymes and promotes gallbladder contraction, aiding digestion. It also slows gastric emptying and acts as a neuropeptide in the brain, where it influences satiety and anxiety. CCK exists in several active forms, such as CCK-8 and CCK-58, derived from the larger precursor procholecystokinin, and signals through CCK receptors, chiefly CCK1 (CCK-A) and CCK2 (CCK-B).

Content Construction Kit (CCK) was a Drupal module that allowed site builders to create custom content types by assigning fields to nodes. It was widely used in earlier Drupal versions, enabling flexible data modeling without code. Over time, its functionality was integrated into Drupal’s core Field API and Entity system, with core content types and field management replacing the need for separate CCK functionality in newer releases.

Other uses of the acronym CCK exist in different domains, and the correct meaning depends on context. In technical writing, it is generally advisable to define the term when first used to avoid ambiguity.