■ adjective
1》 spoken rather than written.
2》 relating to the mouth.
↘done or taken by the mouth.
↘ Psychoanalysis relating to or denoting a stage of infantile psychosexual development in which the mouth is the main source of sensuous experience.
■ noun a spoken examination or test.
Derivatives
~ly adverb
Origin
C17: from late L. ~is , from L. os , or- 'mouth'.