"Matter volume" refers to the amount of space that matter takes up. It describes the physical size or quantity of matter present in a given object or substance. Full definition
Comparison images taken and two and four weeks postpartum revealed a small but significant increase in gray matter volume in specific areas of the brain. (verywellfamily.com)
Reduced visual cortex gray matter volume in children and adolescents with reactive attachment disorder. (psychologytoday.com)
He discovered differences in grey matter volume, which contains the cell bodies of nerve cells, in two specific locations. (sciencedaily.com)