continuous variation

noun Biology.

variation in phenotypic traits such as body weight or height in which a series of types are distributed on a continuum rather than grouped into discrete categories.Compare discontinuous variation.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

continuous variation in Science

Variation within a population in which a graded series of intermediate phenotypes falls between the extremes. Height in human beings, for example, exists in continuous variation.