An Etymological Dictionary of Astronomy and Astrophysics

General: The degree to which two or more attributes or measurements on the same group of elements show a tendency to vary together; the state or relation of being correlated.
Statistics: The strength of the linear dependence between two random variables.

Etymology (EN): From M.Fr. corrélation, from cor- “together,” → com- + → relation.

Etymology (PE): Hambâzâneš , from ham-→ com- + bâzâneš→ relation.