Definition of "tropæum"
tropæum
/tɹəʊˈpiːəm/
noun
plural tropæa
(historical) A monument erected (originally on the field of battle) by the prevailing army (without Senatical grant — contrast triumph) to commemorate victory in war, featuring spoils taken from the enemy (especially the personal arms of the vanquished general), and dedicated to an appropriate god (such as Mars).