Gini coefficient
\ˈjēnē\ \koʊ.ɪˈfɪʃ.ənt\
A measure of inequality, often used to describe how unevenly something is distributed across a population. In the context of longevity, the Gini coefficient can be used to quantify variation in ages at death, with a value of 0 indicating perfect equality (everyone dies at the same age) and a value closer to 1 indicating greater disparity. It helps highlight differences in life expectancy between groups.