Correlation

[Sarah]

Reciprocal relation; corresponding similarity or parallelism ofrelation or law; capacity of being converted into, or of giving placeto, one another, under certain conditions; as, the correlation offorces, or of zymotic diseases. Correlation of energy, the relationto one another of different forms of energy; -- usually having somereference to the principle of conservation of energy. SeeConservation of energy, under Conservation.-- Correlation of forces, the relation between the forces whichmatter, endowed with various forms of energy, may exert.

[Sarah]

A statistic that means a lot less than you think it does, but is useful in arguments if you want to sound right.

[Raeanne Dimick]

a connection or relationship between two or more facts, numbers, etc.:

[Zipporah Schumaker]

A mutual relationship or connection between two or more things.