scheduled tribe 
noun
(In India) an indigenous people officially regarded as socially disadvantaged.Along with tribal people, Dalits are officially referred to as members of ‘scheduled castes and scheduled tribes,’ and have long been treated as ‘untouchable.’...
- He was particularly concerned about the access to schooling and higher education of children belonging to scheduled castes and scheduled tribes, weaker sections and minorities.
- He was a member of a scheduled tribe, a farmer and a father.