Meaning

noun an examination conducted by spoken communication

adjective using speech rather than writing

adjective of or relating to or affecting or for use in the mouth

originPIE word *h₁óh₃s Early 17th century borrowing from Late Latin ōrālis, from ōs (“the mouth”) + -ālis (“-al”, adjectival suffix).

Etymology from Wiktionary, CC BY-SA 3.0