Formula nomenclature is a system of names or terms represented by letters and the Greek alphabet assigned to represent equation physical quantities.  Definition symbols vary widely and do not necessarily represent the information being presented the way an abbreviation does.

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

Greek Alphabet

The Greek alphabet is used in formula nomenclature.