molecular mass

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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.
Farlex Partner Medical Dictionary © Farlex 2012


(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.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
In assessing fat free mass, DEXA is regarded as the most accurate (1.5 %) and precise (1-4 %) compared to other body composition methods of ADP, HW and BIA (Ellis, 2001).
BMI: Body mass index, FM: Fat mass, BIA: Bioelectric impedance analysis, DXA: Dual X-ray absorptiometry, FFM: Fat free mass Table 3: Body composition parameters of LPA and HPA based on physical activity Parameters LPA n=17 HPA n=13 Weight (Kg) 69.9[+ or -]10.8 79.5[+ or -]23.8 BMI (Kg/[m.sup.2]) 23.7[+ or -]3.5 26.4[+ or -]7.0 TEE (Kcal/d) 2481[+ or -]442 3442[+ or -]1046 (***) BMR (Kcal) 1658[+ or -]156 1762[+ or -]460 (**) PAL 1.49[+ or -]0.2 1.84[+ or -]0.5 (***) FM (Kg) BIA 15.2[+ or -]5.9 21.8[+ or -]8.0 (**) DXA 15.4[+ or -]7.7 22.2[+ or -]9.1 (*) FM % BIA 21.2[+ or -]5.1 25.0[+ or -]6.7 (**) DXA 22.2[+ or -]8.1 26.9[+ or -]8.9 FFM (Kg) BIA 54.5[+ or -]5.7 (##) 58.5[+ or -]15.5 (#**) DXA 51.5[+ or -]5.3 54.4[+ or -]15.9 (*) Values are represented as mean[+ or -]SD.
Fat free mass (23) was obtained by the calculation = total body weight (kg) - body fat weight (kg).
In the Indonesian capital Jakarta, hundreds of couples attended a free mass wedding provided free by the authorities.
Shooting stars" were also fired from the rooftops of skyscrapers in a 10-minute musical fireworks display.In the Indonesian capital Jakarta, hundreds of couples attended a free mass wedding provided free by the authorities.
18 OUTDOORS Get on your marks to join free mass daily workout Project Awesome.
Therefore, body fat mass (FM) and fat free mass (FFM) contribute to bone development by increasing compressive forces during skeletal loading (Ho and Kung, 2005).
The typical representative of the initial stage of ultrasonic drill is USDC, which consists of four parts: a piezoelectric transducer, a tuned horn, a free mass, and a drill tool.
Caption: Figure 3: Association of irisin plasma levels with BMI, WC, and fat- free mass. Irisin levels according to (a) BMI percentile, (b) waist circumference (WC), and (c) fat-free mass (Kg).
However, in rare cases, a mesenchymal tumor can be located as a free mass in the abdomen.