diversity index

This term is a technical instrument used primarily in biological and statistical research to move beyond simple species counts. It provides a mathematical value that accounts for both richness (the number of different species) and evenness (how equally individuals are distributed among those species).

In academic and scientific writing, it is used as a precise metric to quantify ecological health or genetic variation. It is rarely used in casual conversation, as it refers to a specific calculated score rather than a general observation of variety.