molecular mass

(redirected from Free mass)
Also found in: Encyclopedia.

mo·lec·u·lar weight (mol wt, MW),

the sum of the atomic weights of all the atoms constituting a molecule; the mass of a molecule relative to the mass of a standard atom, now 12C (taken as 12.000). Relative molecular mass (Mr) is the mass relative to the dalton and has no units.
See also: atomic weight.

molecular mass

the mass of a molecule of a substance as compared with the mass of an atom of carbon-12. It is equal to the sum of the masses of its constituent atoms and is measured in daltons. Formerly called molecular weight. See also atom, atomic mass, molecule.


(mas) [L. massa, mass fr Gr. maza, (barley) cake]
1. A quantity of material, such as cells, that unite or adhere to each other.
2. Soft solid preparation for internal use and of such consistency that it may be molded into pills.
3. A fundamental scalar property of an object that describes the amount of acceleration an object will have when a given force is applied to it. The metric unit of mass is the kilogram. One kilogram equals 2.205 pounds. See: weight
4. Large, extensive, or encompassing an entire organ or population group (e.g., a mass vaccination).

cell mass

In embryology, the mass of cells that develops into an organ or structure.

epithelial mass

The inner portion of a developing gonad enclosed within the germinal epithelium.

fat mass

Total body fat. It can be measured with dual energy absorptiometry or bioelectrical impedance techniques.

fat-free mass

The lean body mass plus the skeletal mass.

formula mass

Gram molecular mass.

gram molecular mass

The mass or weight in grams of a substance equal to its molecular mass/weight.
Synonym: formula mass; gram molecular weight

inner cell mass

In embryology, the group of cells within the blastocyst from which the embryo, yolk sac, and amnion develop.
See: blastocyst

intermediate cell mass

A plate of nonsegmented mesoderm lying lateral to the segments (somites) and connecting them to the nonsegmented lateral mesoderm. Synonym: nephrotome

lateral mass of the atlas

The parts of the first cervical vertebra that articulate with the occipital bone superiorly and the axis inferiorly.

lean body mass

The weight of the body minus the fat content. It includes bones, muscles, and internal organs.

molecular mass

Molecular weight.

molecular mass,

References in periodicals archive ?
When evaluating the relationship between energy availability and the hormones that regulate menstrual function, investigators found that hormone disturbances occurred below an energy availability level of 30 kilocalories per kilogram of lean tissue or fat free mass (kcal/kg FFM), regardless of whether this low energy availability occurred as a result of decreased energy intake or increased exercise energy expenditure (Loucks 2006; Loucks and Heath 1994).
Body density or fat free mass was measured by hydrostatic weighing in a therapeutic pool.
The Subtraction Argument for the Possibility of Free Mass, DAVID EFIRD and TOM STONEHAM
A second round of free mass vaccination clinics to immunize Arkansans against both seasonal and HIN1 influenza will begin Dec.
She will join former Strictly winner Karen Hardy for two free mass dancing events at the world-famous Winter Gardens.
There was a significant difference in % BF, fat mass (FM), fat free mass (FFM) and waist circumference between the 2 groups (P<0.
According to Newton's third law, if a free mass m exerts a force m[c.
Additionally, body compositions were performed to determine the fat free mass of participants.
Participants will receive a test pack every two years - and the free mass screening will be amongst the biggest in the world.
Lazutina finished second in the 15 kilometre free mass start, in the 5km free pursuit and fourth in the 10km classical.
About the only cure-all not discussed was one suggested by this reviewer in the late 1950s when he argued that free mass transit in cities would - on a consolidated cost basis - be relatively less expensive, judged from almost any angle of the populace and its economy.