Learn in the textbookContinuous Improvement and Automation of Development and Operations
DefinitionContinuous Integration (継続的インテグレーション) is the full name of CI, and refers to the same practice.
ExplanationIntegration (インテグレーション) means combining, here bringing each developer's changes together into one program. Continuous means repeating that integration routinely while development is still under way.
Memory hookIntegrate shares its root with integer (a whole number with nothing missing), and means turning scattered parts into one complete whole.