"Morphological variation" refers to the differences or changes in the physical appearance or structure of something. It can describe the various shapes, sizes, or forms that objects or living things can have. Full definition
We extensively modified the Abstract and Introduction, trying to provide a comprehensive background on the subject of intraspecific morphological variation in hominins and on how it can influence biological and behavioural aspects. (elifesciences.org)
Island spotted skunks show little morphological variation between islands, aside from the skunks found on Santa Rosa Island being slightly longer than those found on Santa Cruz Island. (en.wikipedia.org)
The Dmanisi sample, which now comprises five crania, provides direct evidence for wide morphological variation within and among early Homo paleodemes. (becominghuman.org)