atomic mass

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1. a lump or collection of cohering particles.
2. that characteristic of matter that gives it inertia. Symbol m.
atomic mass atomic weight; see also atomic mass unit.
inner cell mass an internal cluster of cells at the embryonic pole of the blastocyst which develops into the body of the embryo.
lean body mass that part of the body including all its components except neutral storage lipid; in essence, the fat-free mass of the body.
relative molecular mass technically preferable term for molecular weight.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

a·tom·ic mass

(ă-tomik mas)
Total number of protons, neutrons, and electrons in an atom.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
performed all calculations for obtaining activity values from the isotopic mass data and the reconciliation with the confirmatory measurements.
A second, vital contribution of the carbon isotopes to the quality of the overall characterization of SRM 1649a particulate carbon, is the assessment of isotopic mass balance--i.e., the justification of the [C.sup.14] ([C.sup.13]) composition o f the total particulate carbon (TC), in terms of the sum of the concentration-weighted [C.sup.14] values of the major carbonaceous species.