sceptic, n. & adj. (US skeptic)
1 a person inclined to doubt all accepted opinions; a cynic.
2 a person who doubts the truth of Christianity and other religions.
3 hist. a person who accepts the philosophy of Pyrrhonism.
--adj. = SCEPTICAL.
F sceptique or L scepticus f. Gk skeptikos (as SCEPSIS)