| zero p. |
in electricity, an arbitrary reference point (usually the potential of the earth) used as a zero value in comparison to other electrical potentials.
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| zeroth l. of thermodynamics |
see l's of thermodynamics.
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| Zestoretic |
trademark for a combination preparation of lisinopril and hydrochlorothiazide.
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| zeta p. |
the electric potential across a solid-liquid interface. The zeta potential at the surface of erythrocytes is the net potential produced by both the negative charges on the cell surface and the positive charges in a cloud of cations attracted by the surface charge and forming a layer over the surface; it is responsible for a repelling force between erythrocytes that resists agglutination or rouleau formation.
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| zeta sedimentation r. |
a measurement comparable to the erythrocyte sedimentation rate, except that it is unaffected by anemia. The packed-cell volume (zetacrit) of a blood specimen is calculated by centrifuging the specimen in a Zetafuge, a specially designed instrument that produces controlled cycles of compaction and dispersion and allows rouleaux to form and sediment rapidly. The zetacrit divided into the true hematocrit gives the zeta sedimentation ratio.
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