Opera di riferimento: Il registro di San Pietro di Sorres

Primo,  agg. m. sing. e avv., primo < PRIMUS, 5.2(2v.); 15.2; 19.1; 37.2; 93.1; 99.2; 109.2; 158.1; 199.1; 219.3; 225.6; 234.4; 258.3; 273.1; 297.4; 319.17; 331.2; 340.2; primu: 8.5; 34.4; 50.2; 51.1; 59.2; 68.4; 75.3; 76.2; 105.3; 156.3; 161.2; 173.1; 177.1; 182.2; 183.4; 184.2; 188.1,3; 190.2; 191.2; 202.3; 205.3; 207.1; 212.2; 239.1; 240.4; 262.1,2; 275.2; 294.2; 296.2; 310.3; 312.1; 315.2; 319.2,5,14; 335.1; 337.2; 350.2; 355.2; 359.5; prima: f. sing., 9.2; 19.2; 34.1; 36.3; 81.1; 106.3; 110.1; 138.2; 158.1; 164.4; 190.1; 191.2; 205.1; 227.1; 228.4; 268.1; 294.2; 305.1; 349.2; primos: m. pl., 12.1; 251.6; 335.3.