Muon radiative energy loss (in 1.0E06 cm^2/g) in meitnerium (Mt) with Z = 109, A = [278.1563(7)] (f12.0,4f12.4) E (GeV) b_brem b_pair b_nucl b_total 2. 2.4792 0.0456 0.3527 2.8776 5. 3.4535 1.9983 0.3764 5.8282 10. 4.2507 3.5228 0.3691 8.1427 20. 5.0690 4.8960 0.3562 10.3211 50. 6.1373 7.0249 0.3417 13.5039 100. 6.8941 8.4207 0.3349 15.6497 200. 7.5812 9.6492 0.3317 17.5622 500. 8.3467 10.7668 0.3320 19.4455 1000. 8.8037 11.3548 0.3371 20.4955 2000. 9.1562 11.7755 0.3451 21.2769 5000. 9.4803 12.1275 0.3597 21.9675 10000. 9.6393 12.2878 0.3742 22.3013 20000. 9.7439 12.3939 0.3911 22.5290 50000. 9.8371 12.4713 0.4176 22.7260 100000. 9.8677 12.5035 0.4402 22.8114