Muon radiative energy loss (in 1.0E06 cm^2/g) in meitnerium (Mt) with Z = 109, A = [278.156(5)] (f12.0,4f12.4) E (GeV) b_brem b_pair b_nucl b_total 2. 2.5816 0.0473 0.3540 2.9830 5. 3.5941 2.0729 0.3779 6.0449 10. 4.4220 3.6545 0.3706 8.4471 20. 5.2716 5.0788 0.3529 10.7033 50. 6.3803 7.2874 0.3431 14.0107 100. 7.1656 8.7353 0.3362 16.2370 200. 7.8786 10.0097 0.3330 18.2213 500. 8.6727 11.1691 0.3332 20.1750 1000. 9.1469 11.7790 0.3383 21.2641 2000. 9.5126 12.2163 0.3463 22.0753 5000. 9.8488 12.5806 0.3610 22.7903 10000. 10.0137 12.7478 0.3756 23.1371 20000. 10.1222 12.8569 0.3926 23.3717 50000. 10.2190 12.9371 0.4191 23.5752 100000. 10.2507 12.9708 0.4418 23.6634