proband
/ˈprəʊbænd/noun
- a person serving as the starting point for the genetic study of a family (used especially in medicine and psychiatry)（尤用于医学与精神病学）渊源者, 先证者; 基人（作为家庭遗传研究起源的人）。
词源
1920s: from Latin probandus 'to be proved'，gerundive of probare 'to test'.