CORRELATION

correlation, correlational statistics

(noun) a statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other

correlation, correlativity

(noun) a reciprocal relation between two or more things

Source: WordNet® 3.1

Etymology

Noun

correlation (countable and uncountable, plural correlations)

A reciprocal, parallel or complementary relationship between two or more comparable objects.

(statistics) One of the several measures of the linear statistical relationship between two random variables, indicating both the strength and direction of the relationship.

(algebra) An isomorphism from a projective space to the dual of a projective space, often to the dual of itself.

Source: Wiktionary

Cor`re*la"tion (-l"shn), n. Etym: [LL. correlatio; L. cor- + relatio: cf. F. corrélation. Cf. Correlation.]

Definition: Reciprocal relation; corresponding similarity or parallelism of relation or law; capacity of being converted into, or of giving place to, one another, under certain conditions; as, the correlation of forces, or of zymotic diseases. Correlation of energy, the relation to one another of different forms of energy; -- usually having some reference to the principle of conservation of energy. See Conservation of energy, under Conservation.

– Correlation of forces, the relation between the forces which matter, endowed with various forms of energy, may exert.

Source: Webster’s Unabridged Dictionary 1913 Edition