The term "Southern Yemeni Dinar" refers to the currency used in the former South Yemen until its unification with the North in 1990. Synonyms for this currency include the South Yemeni Rial, which replaced the Dinar after the unification, and the Arabic term 'Abyani.' Other possible synonyms include 'Adeni Dinar,' 'Hadrami Dinar,' or 'Mahri Dinar,' which are based on the regions where these currencies were used in Southern Yemen. Since the unification, most transactions in Yemen are conducted using the Yemeni Rial, which replaced both the North and South Yemeni currencies and is currently used throughout the country.