Adelphia is a genus in the Malpighiaceae, a family of about 75 genera of flowering plants in the order Malpighiales. Adelphia comprises four species of woody vines native to the West Indies, Mesoamerica, and western South America.

A "brotherhood," or collection of stamens in a bundle; -- used in composition, as in the class names, Monadelphia, Diadelphia, etc.

Adelphia Communications Corporation, named after the Greek word "brothers", was the fifth largest cable company in the United States before filing bankruptcy in 2002 due to internal corruption. Adelphia was founded in 1952 within the town of Coudersport, Pennsylvania. The headquarters for the company was moved to Greenwood Village, Colorado shortly after filing for bankruptcy.