Webster's Revised Unabridged Dictionary · 1913

Cognate

Cognate , adjective

[Latin cognatus; co- + gnatus, natus, past participle of nasci, anciently gnasci, to be born. See Nation, and compare Connate.]

1.
(Law) Allied by blood; kindred by birth; specifically (Law), related on the mother's side.
2.
Of the same or a similar nature; of the same family; proceeding from the same stock or root; allied; kindred; as, a cognate language.

Cognate , noun

1.
(Law) One who is related to another on the female side. — Wharton
2.
One of a number of things allied in origin or nature; as, certain letters are cognates.