proband

noun

pro·​band ˈprō-ˌband 

prō-ˈband

: an individual affected with a disorder who is the first subject in a study (as of a genetic character in a family lineage)

Word History

Etymology

Latin probandus, gerundive of probare

First Known Use

circa 1929, in the meaning defined above

Medical Definition

proband

noun

pro·​band ˈprō-ˌband 

: an individual affected with a disorder who is the first subject in a study (as of a genetic character in a family lineage)

called also propositus