Conjectural
Pronunciation : Con*jec"tur*al
Part of Speech : a.
Etymology : [L. conjecturalis: cf. F. conjectural.]
Definition : Defn: Dependent on conjecture; fancied; imagined; guessed at; undetermined; doubtful. And mak'st conjectural fears to come into me. Shak. A slight expense of conjectural analogy. Hugh Miller. Who or what such editor may be, must remain conjectural. Carlyle.
Source : Webster's Unabridged Dictionary, 1913