Webster's Revised Unabridged Dictionary · 1913

parenthetic

parenthetic (par`en*thet"ik) , adjective

[Compare Greek pare`nqetos.]

1.
Of the nature of a parenthesis; pertaining to, or expressed in, or as if in, a parenthesis; as, a parenthetical clause; a parenthetic remark; a parenthetical style.
A parenthetical observation of Moses himself. — Hales
2.
Using or containing parentheses.
3.
Added within parentheses to amplify or explain; as, parenthetical remarks.

Also: parenthetical