The Collaborative International Dictionary
Conjecturally
Conjecturally \Con*jec`tur*al"ly\, n.
That which depends upon guess; guesswork. [R.]
--Sir T.
Browne.
Conjecturally
Conjecturally \Con*jec`tur*al*ly\, adv.
In a conjectural manner; by way of conjecture.
--Boyle.
Wiktionary
conjecturally
adv. In a conjectural manner.
Usage examples of "conjecturally".
Now, speaking conjecturally, we think thou mightst find in that camp some cavalier who, for the love of truth and his own augmentation of honour, will do battle with this same traitor of Montserrat.
You'll not mention, of course, and I'm only feeling my way just now, and speaking conjecturally altogether.