Parenthetically

[,pɛərən'θetikəli]

(adv.) in a parenthetical manner; 'he added parenthetically that he would not attend the wedding ceremony'.

Checker: Sabina--From WordNet

(adv.) In a parenthetical manner; by way of parenthesis; by parentheses.

Edited by Daisy

The number, sir, said Mr. Vholes parenthetically, I believe I have already mentioned. Charles Dickens. Bleak House.
He wondered (he remarked parenthetically) what noodle first made it the fashion to teach women French. Charlotte Bronte. Shirley.
If you WILL PARLAY, you know, says Mr. Bucket parenthetically, you must take the consequences. Charles Dickens. Bleak House.

Edited by Daisy