quarter-century
UK: ˌkwɔːtə ˈsɛntʃʊri | US: ˌkwɔːrtər ˈsɛntʃəri
n. a period of twenty-five years
The word "quarter-century" is a compound formed by combining "quarter" (from Latin quartarius, meaning "one fourth") and "century" (from Latin centuria, originally referring to a group of 100 soldiers, later extended to mean 100 years). The term logically denotes one-fourth of a century, or 25 years. This construction follows English's tendency to create precise time-related terms by blending numerical fractions with established units (e.g., "millennium," "decade").
The museum celebrated its quarter-century anniversary with a special exhibition.
Technological advancements in the last quarter-century have transformed communication.
She dedicated a quarter-century of her life to teaching at the university.
The historic building has stood for over a quarter-century without renovation.
His research spans a quarter-century of climate data.