### Definition of Correlation

1. Noun. A reciprocal relation between two or more things.

Exact synonyms: Correlativity
Generic synonyms: Reciprocality, Reciprocity
Derivative terms: Correlate, Correlate, Correlational, Correlative, Correlative

2. Noun. A statistic representing how closely two variables co-vary; it can vary from -1 (perfect negative correlation) through 0 (no correlation) to +1 (perfect positive correlation). "What is the correlation between those two variables?"

3. 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.

### Definition of Correlation

1. n. 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.

### Definition of Correlation

1. Noun. A reciprocal, parallel or complementary relationship between two or more comparable objects ¹

2. Noun. (statistics) One of the several measures of the linear statistical relationship between two random variables, indicating both the strength and direction of the relationship. ¹

¹ Source: wiktionary.com

1. [n -S]

### Medical Definition of Correlation

1. most generally, the degree to which one phenomenon or random variable is associated with or can be predicted from another. In statistics, correlation usually refers to the degree to which a linear predictive relationship exists between random variables, as measured by a correlation coefficient. Correlation may be positive, i.e., both variables increase or decrease together or negative or inverse, i.e., one variable increases when the other decreases. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

### Correlation Pictures

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### Lexicographical Neighbors of Correlation

 correctourcorrectresscorrectrixcorrectscorrefoccorrefocscorreicorrei debendicorrelatablecorrelate correlatedcorrelatedlycorrelatescorrelatingcorrelatinglycorrelation (current term)correlation coefficientcorrelation coefficientscorrelation does not imply causationcorrelation energy correlation matrixcorrelation tablecorrelationalcorrelational analysiscorrelational methodcorrelational statisticscorrelationscorrelativecorrelative differentiationcorrelatively

### Literary usage of Correlation

Below you will find example usage of this term as found in modern and/or classical literature:

1. Publications of the American Statistical Association by American Statistical Association (1920)
"^Tors in the conception of correlation and the use of the correlation ti c. t ... The gist of Dr. King's argument runs as follows: (1) the correlation ..."

2. Readers' Guide to Periodical Literature by Anna Lorraine Guthrie, Marion A. Knight, H.W. Wilson Company, Estella E. Painter (1920)
"Corrective correlation (biology) Application of correlation formulae to the ... Am Nat 51:238-44 Ap '17 Chemical basis of correlation: production of equal ..."

3. Projective Geometry by John Wesley Young, Oswald Veblen (1910)
"Analytic representation of a correlation between two planes. ... Any correlation in a plane is given as a transformation of points into lines by equations ..."

4. Report (1905)
"In a general plan of investigation of organic correlation it was proposed as one item to make a thorough study of the degree of correlation existing between ..."

5. Psychology: A Study of Mental Life by Robert Sessions Woodworth (1921)
"THE correlation OP ABILITIES There is no opposition between " general ... In technical language, there is a " positive correlation " between general ..."

6. The Journal of Geology by University of Chicago Department of Geology and Paleontology (1904)
"The correlation o\ Geological Faunas: A Contribution to Devonian Paleontology. ... IN the investigation of geologic problems concerned with correlation, ..."