Definition
While there is not a precise, accepted definition of this term, cyberinfrastructure is generally used to describe research environments that support advanced data acquisition, data storage, data management, data integration, data mining, data visualization, and other computing and information processing services distributed over the Internet beyond the scope of a single institution. In scientific usage, cyberinfrastructure connects laboratories, data, computers, and people with the goal of enabling novel scientific theories and knowledge. Cyberinfrastructure includes systems for managing, archiving, preserving, and processing data, including digital libraries, digital archives, and the software and hardware supporting them.
An institutional repository could be considered a “piece” of cyberinfrastructure in that it can support the storage, management, and processing of research data.
Relevant Literature
This article describes the origin of the term cyberinfrastructure, discusses several related terms, and provides several examples of cyberinfrastructure:
https://www.researchgate.net/publication/49471518_What_is_Cyberinfrastructure