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 ?
Tables 2 to 4 show the results; for outliers, the best possible continued fraction is displayed (not as a zero sum), and it can be seen that in most cases the atomic mass is reproduced with a numerical error very little higher than the standard deviation.
Students are asked to contemplate the relationship between an element's atomic number and its atomic mass (protons + neutrons).
In this case, what would be the relative atomic mass in amu (with respect to the mass of a [sup.12]C atom) and the molar mass in grams of an argon atom?
92) because of the loss of two protons, and the atomic mass decreases by four (234 from 238) because of the loss of two protons and two neutrons.
We must conclude that mass, represented here by the additional atomic mass of neutrons, does not affect backscattering of electrons under microprobe conditions.
We have estimated the influence of the anion's atomic mass M on its flow velocity.
Discovery of heavy forms of oxygen (0-17 and 0-18) creates a discrepancy between chemists' atomic weight for oxygen and physicists' atomic mass for the oxygen-16 isotope.
Deuterium Search "For several years there has been doubt among astronomers as to whether or not the interstellar gas, which is mainly ordinary hydrogen, contains an appreciable fraction of deuterium--heavy hydrogen of atomic mass two....
Photodeactivation involves the irradiation of specific radioactive isotopes to force the emission of a neutron, thereby producing an isotope of reduced atomic mass. These resultant isotopes are characteristically either not radioactive or radioactive with a short half-life.
Steffen Peiser (1957-present) Crystal growth, symmetry, and characterization for free-radical research, relative atomic mass values, and the fundamental constants.