Open English Wordnet
Nouns
(n)arrested development, fixation, infantile fixation, regressionan abnormal state in which development has stopped prematurely
(n)regression(psychiatry) a defense mechanism in which you flee from reality by assuming a more infantile state
(n)regression, simple regression, regression toward the mean, statistical regressionthe relation between selected values of x and observed values of y (from which the most probable value of y can be predicted for any value of x)