Supposititious
Pronunciation : Sup*pos`i*ti"tious
Part of Speech : a.
Etymology : [L. suppositicus. See Supposition.]
Definition : 1. Fraudulently substituted for something else; not being what is purports to be; not genuine; spurious; counterfeit; as, a supposititious child; a supposititious writing. Bacon.
2. Suppositional; hypothetical. [R.] Woodward. -- Sup*pos`i*ti"tious*ly, adv. -- Sup*pos`i*ti"tious*ness, n.
Source : Webster's Unabridged Dictionary, 1913