ter·ti·ary /ˈtɚʃiˌeri, Brit ˈtə:ʃəri/ adjective
formal : third in order, importance, or value
▪ Headaches often occur during the tertiary stage of the illness. ▪ our tertiary goals ▪ (chiefly Brit) tertiary education [=education at the college or university level] —
compare primary, secondary 
