(grammar) A pronoun in a relative clause which refers to the antecedent of the relative pronoun.

The main city of a metropolitan area; particularly one containing multiple cities. / Synonym of central business district / Used other than figuratively or idiomatically: see central, city.

A traditional creamer (jug) in the shape of a cow.

Of or relating to any of the historical figures called Theodosius / Of or relating to the Theodosian dynasty of the Roman Empire