Origin of proband

1925–30; < Latin probandus, gerundive of probāre to test, probe
Also called propositus. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for proband


  1. another name (esp US) for propositus (def. 2)

Word Origin for proband

C20: from Latin probandus, gerundive of probāre to test
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for proband

1929, from Latin probandus, gerundive of probare "to make good, esteem good; make credible, show, prove, demonstrate" (see prove).

Online Etymology Dictionary, © 2010 Douglas Harper

proband in Medicine


  1. An individual or member of a family being studied in a genetic investigation.index case propositus
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.