an·cil·lary 
/ˈænsəˌleri, Brit ænˈsɪləri/ adjective
/ˈænsəˌleri, Brit ænˈsɪləri/ adjective formal : providing something additional to a main part or function : extra
▪ The company hopes to boost its sales by releasing ancillary products. ▪ ancillary services/expenses — sometimes + to ▪ These expenses are ancillary to the basic cost.
▪ The company hopes to boost its sales by releasing ancillary products. ▪ ancillary services/expenses — sometimes + to ▪ These expenses are ancillary to the basic cost.
