[fuh-mil-yuh l, -mil-ee-uh l]

Origin of familial

From French, dating back to 1895–1900; see origin at family, -al1
Related formsin·ter·fa·mil·ial, adjectivenon·fa·mil·ial, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for interfamilial


  1. of or relating to the family
  2. occurring in the members of a familya familial disease
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 interfamilial



from French familial, from Latin familia (see family). Meaning "hereditary" is from 1900; "family-like" is from 1903.

Online Etymology Dictionary, © 2010 Douglas Harper

interfamilial in Medicine


  1. Occurring or tending to occur among family members, usually by heredity.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.