Oral
WordNet
adjective
(1) A stage in psychosexual development when the child's interest is concentrated in the mouth; fixation at this stage is said to result in dependence, selfishness, and aggression
(2) Of or involving the mouth or mouth region or the surface on which the mouth is located
"The oral cavity"
"The oral mucous membrane"
"The oral surface of a starfish"
(3) Using speech rather than writing
"An oral tradition"
"An oral agreement"
(4) Of or relating to or affecting or for use in the mouth
"Oral hygiene"
"An oral thermometer"
"An oral vaccine"
noun
(5) An examination conducted by word of mouth