An island of Equatorial Guinea, in the eastern part of the Gulf of Guinea. Its chief town is Malabo, the capital of Equatorial Guinea.
Former names Fernando Póo and Macias Nguema
Definition of Bioko in US English:
Bioko
proper nounbēˈōkō
An island in Equatorial Guinea, in the eastern part of the Gulf of Guinea. Its chief town is Malabo, which is also the capital of Equatorial Guinea. Known as Fernando Póo until 1973, it was called Macias Nguema 1973–79.