Tusculan /ˈtʌskjʊlən/adjective 2noun 1forms 1 adjective2 •(historical) Of or relating to Tusculum.The Tusculan troops also joined them. — 1871 •(historical) Of or relating to the counts of Tusculum, the most powerful secular noblemen in Latium, near Rome, between the 10th and 12th centuries. noun1 •(historical) A native or inhabitant of Tusculum. formsTusculans