Main Page | See live article | Alphabetical index Aba. (1) A form of altazimuth instrument, invented by, and Cabled after, Antoine d'Abbadie; (2) a rough homespun manufactured in Bulgaria (3) a long coarse shirt worn by the Bedouin Arabs. Portions of this article are based on an article from a 1911 Encyclopedia. Aba is a city in south-eastern Nigeria. The capital of the short-lived secessionist state of Biafra was moved to Aba from Enugu as Nigerian troops advanced into Biafra. The city of Aba has a population of about 257,300 (1990 est.). This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.