distance matrix
square matrix (two-dimensional array) containing the distances, taken pairwise, between the elements of a set. Depending upon the application involved, the distance being used to define this matrix may or may not be a metric
en-GB/ˈdɪstəns ˈmeɪtɹɪks/
en-US/ˈdɪstəns ˈmeɪtɹɪks/