Civil War in Libya

[Viking]

Blacks are habitually referred to as 'slaves' (abeed) in Arab countries. Among Libya's black inhabitants are native Libyans descending from actual slaves or from black tribes in the South, migrant workers from all over Africa, and African mercenaries who were drafted into Gaddafi's regular and irregular forces since the 1980's. There are also groups of African guerilla's who used to be trained in Gaddafi's training camps.

AII

Each of the Arab countries have their own history, both before and after decolonisation, and so the usage of a word could have different meanings in different countries. Importantly, a word can become synonymous with certain groups, such as in your WP article:

It is commonly used by the Northern Sudanese to refer to Southern Sudanese

which as time passes could mean that 'abeed' would eventually be a derogatory word that means 'South Sudanese', where few people would now associate it with 'slave' (meanings of words may change fast). So again, more research is and/or details are needed.