of or relating to or affecting or for use in the mouth
oral hygiene
an oral thermometer
an oral vaccine
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
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