mass spectrum

A spectrum which is obtained when a beam of ions is separated according to the mass-to-charge (m z) ratios of the ionic species contained within it.
Source:
PAC, 1991, 63, 1541 (Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)) on page 1550
See also:
Orange Book, p. 204
PAC, 1990, 62, 2167 (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2200