cognation definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
relationship by descent from the same ancestor or source
Origin: Middle English cognacioun ; from Classical Latin cognatio: see cognate
cognation - Legal Definition
Relationship by blood, whether through a common female or male descendant, rather than by marriage.