thirdly

third +‎ -ly

thirdly (not comparable)

1. In the third place; third in a row.
   • 1992, Rudolf M[athias] Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, New York, N.Y.: Columbia University Press, →ISBN, page viii:

     Thirdly, I continue to attempt to interdigitate the taxa in our flora with taxa of the remainder of the world.

• 3rdly