Propositus Definition

prō-pŏzĭ-təs
noun
The person who is the subject of a question or action.
American Heritage
The family member chosen as the starting point in genealogical research, in the investigation of an inheritable disease, etc.
Webster's New World
A person to whom descendants are commonly related.
American Heritage Medicine

The first identified case of an inherited disease in a family. The proband or index case. Propositus applies when the patient is male; proposita if female.

The propositus was an elderly man who passed on the disorder to three of his four children and 9 of 14 grandchildren.
Wiktionary

Origin of Propositus

  • Latin prōpositus past participle of prōpōnere to set forth propose

    From American Heritage Dictionary of the English Language, 5th Edition

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