What is the antonym of paediatrician?

There isn't a single perfect antonym for "paediatrician," as it depends on the context. Here are some possibilities:

* Geriatrician: A doctor specializing in the care of elderly people. This is the most direct opposite in terms of age group.

* Adult doctor: A general term for a doctor who treats adults, encompassing many specialties.

* Non-pediatric specialist: This is a broad term encompassing any doctor who doesn't specialize in children's health.

It's important to consider the specific situation and the intended meaning when choosing an antonym for "paediatrician."