The term 'Seven Group' is also known as a HEPTAD, which is a six-letter word. Seven Group is a term used to describe a group of seven people or things. It is often used in mathematics, music, and literature. In mathematics, a HEPTAD is a set of seven numbers that are related in some way. In music, a HEPTAD is a group of seven notes that form a chord. In literature, a HEPTAD is a group of seven words or phrases that are related in some way.