occurrence or existence together or in connection with one another, coexistence
A concomitant.
The Roman Catholic doctrine of the existence of the entire body of Christ in the Eucharist, under each element, so that the body and blood are both received by communication in one kind only.
A reciprocal, parallel or complementary relationship between two or more comparable objects.
An isomorphism from a projective space to the dual of a projective space, often to the dual of itself.
One of the several measures of the linear statistical relationship between two random variables, indicating both the strength and direction of the relationship.