Final answer:
Operationalization is the term describing the process of defining a concept or variable through specific measurement steps, ensuring reliability and validity in research.
Step-by-step explanation:
The term that refers to the material construct representing some part of the world is Operationalization. This concept involves defining a concept or variable in terms of the specific procedures or steps required to measure it. By operationalizing a variable, researchers can ensure that their methodology allows for the collection of data that is systematic and replicable, contributing to the reliability and validity of their research. The operational definition makes an abstract concept measurable by assigning it an observable condition that can be quantified.