Pseudo- \Pseu"do-\ [Gr. pseydh`s lying, false, akin to psey`dein to belie; cf. psydro`s lying, psy`qos a lie.]

A combining form or prefix signifying false, counterfeit, pretended, spurious; as, pseudo-apostle, a false apostle; pseudo-clergy, false or spurious clergy; pseudo-episcopacy, pseudo-form, pseudo-martyr, pseudo-philosopher. Also used adjectively.

Source: Webster's Revised Unabridged Dictionary (1913)