Mid 16th century. From post-classical Latin communibus annis from classical Latin commūnibus, ablative plural masculine of commūnis + annīs, ablative plural of annus year.
Definition of communibus annis in US English:
communibus annis
adverbkəˈmjuːnɪbəs ˌanɪs
historical
In normal or average years.
Origin
Mid 16th century. From post-classical Latin communibus annis from classical Latin commūnibus, ablative plural masculine of commūnis + annīs, ablative plural of annus year.