| mass n. |
the number of nucleons (protons plus neutrons) in the atom of a nuclide; generally indicated by a superscript preceding the symbol of a chemical element (e.g., 131I) to denote a specific isotope.
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| mass p. |
strong usually brief bursts of peristaltic movements, which propel intestinal contents through long stretches of the intestine or colon, often resulting in defecation.
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| mass r. |
examination by x-rays of the general population or of large groups of the population.
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| mass s. |
that performed on or made available to an entire population.
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| mass transfer–area c. |
the permeability of a dialysis membrane multiplied by the available area of the membrane, calculated as the clearance rate by diffusion when there is no ultrafiltration and when there is not yet any solute in the dialysate.
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