• (n.) That tie of consanguinity which exists between persons descended from the same mother; -- used in distinction from agnation. • (n.) Relationship by blood; descent from the same original; kindred. • (n.) Participation of the same nature. Found on http://thinkexist.com/dictionary/meaning/cognation/
Cog·na'tion noun [ Latin cognatio .] 1. Relationship by blood; descent from the same original; kindred. « As by our cognation to the body of the first Adam. Jer. Taylor. » 2. Participation of the same nature. Sir T. Browne. « A like te... Found on http://www.encyclo.co.uk/webster/C/105