Webster's Revised Unabridged Dictionary · 1913

Filial

Filial , adjective

[Latin filialis, from filius son, filia daughter; akin to e. female, feminine. Compare Fitz.]

1.
Of or pertaining to a son or daughter; becoming to a child in relation to his parents; as, filial obedience.
2.
Bearing the relation of a child.
And thus the filial Godhead answering spoke. — Milton