The antique map on display labeled the peninsula 'Corea', reflecting older Western usage.

During the photocatalytic experiment, the choice of coreactant significantly affected the yield.

During the reaction, the coreactants must be precisely measured to ensure reproducibility.

The committee studied the coreachability of certain states to ensure the system could always reach a valid final configuration.

In the directed graph, nodes A and B are coreachable if there is a path from A to B and a path from B to A.

The museum displayed a rare 18th-century map labeling the peninsula as Corean territory.

The museum's exhibit included several Corean artifacts inscribed with 19th-century script.

The historian translated a 19th-century diary written by a Corean.