Thomson
From Mass Spec Terms
Proposed Term
A new unit of the physical quantity mass/charge. The symbol m/q would then be used in place of the dimensionless m/z.
Cooks, R. G. and A. L. Rockwood (1991). "The 'Thomson'. A suggested unit for mass spectroscopists." Rapid Communications in Mass Spectrometry 5(2): 93.
"The Thomson (Th), a unit for mass-to-charge ratio, was proposed to alleviate problems with imprecise terminol. generated by the advent of multiply charged ion mass spectroscopy. The definition proposed for the unit is: 1Th == 1 amu/atomic charge."
Mass Spec Desk Reference
See Mass Spec Desk Reference page 27 for an argument against the adoption of this term.