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[proh-band] /ˈproʊ bænd/
noun, Genetics.
a patient who is the initial member of a family to come under study.
Also called propositus.
Origin of proband
1925-30; < Latin probandus, gerundive of probāre to test, probe Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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British Dictionary definitions for proband


another name (esp US) for propositus (sense 2)
Word Origin
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
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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
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proband in Medicine

proband pro·band (prō'bānd')
An individual or member of a family being studied in a genetic investigation. Also called index case, propositus.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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