Webster's Revised Unabridged Dictionary · 1913

Agnate

Agnate ({not transcribed}) , adjective

[Latin agnatus, past participle of agnasci to be born in addition to; ad + nasci (for gnasci) to be born. Compare Adnate.]

1.
Related or akin by the father's side; also, sprung from the same male ancestor; as, agnate brother: a brother having the same father, but a different mother; in ths sense it is a correlative of uterine.
2.
Allied; akin.
Agnate words. — Pownall
Assume more or less of a fictitious character, but congenial and agnate with the former. — Landor

Agnate , noun

[Compare French agnat.]

(Civil Law) A relative whose relationship can be traced exclusively through males.