Theta Delta Chi (ΘΔΧ, Theta Delt) is a social fraternity that was founded in 1847 at Union College. While nicknames differ from institution to institution, the most common nicknames for the fraternity are Theta Delt, Thete, TDX, and TDC. Theta Delta Chi brothers refer to their local organization as Charges rather than using the common fraternity nomenclature of chapter.
Read more about Theta Delta Chi: Charges and Colonies