| absolute CD4 count | The number of helper T-lymphocytes in a cubic millimeter of blood. With HIV, the absolute CD4 count declines as the infection progresses. The absolute CD4 count is frequently used to monitor the extent of immune suppression in persons with HIV. Also called a T4 count. (12 Dec 1998) |
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| absolute configuration | <chemistry> The three-dimensional arrangement of the atoms around the chiral centre of a molecule. (09 Oct 1997) |
| absolute dehydration | Actual water deficit as measured by a difference from the normal or from a given water content. (05 Mar 2000) |
| absolute eosinophil count | <haematology, investigation> A measurement (cells per microlitre) of the number of eosinophils in a blood specimen. This measurement is useful in the evaluation of autoimmune disease, allergies, eczema, leukaemia, asthma and hay fever. Normal absolute eosinophil counts are less than 350 cells/mcl (microlitre). (27 Sep 1997) |
| absolute filter | <apparatus> A fine-pored, steam-sterilisable filter that is used to trap airborne microorganisms. The filter's pores are about 2 micrometres in diameter, smaller than the particles it is designed to remove. (06 May 1997) |
| absolute glaucoma | The final stage of blindness in glaucoma. (05 Mar 2000) |
| absolute gravity | <chemistry> The value that denotes the density (specific gravity) at standard conditions (for gases, these conditions are standard atmospheric pressure at zero degrees Celsius). (06 May 1997) |
| absolute hemianopia | Hemianopsia in which the affected field is totally insensitive to all visual stimuli. Synonym: complete hemianopia. (05 Mar 2000) |
| absolute hyperopia | Manifest hyperopia that cannot be overcome by an effort of accommodation. (05 Mar 2000) |
| absolute instabilities | <physics> A class of plasma instabilities growing exponentially with time at a point in space, in contrast to convective instabilities. (09 Oct 1997) |
| absolute intensity threshold acuity | The minimal light that can be seen. (05 Mar 2000) |
| absolute leukocytosis | An actual increase in the total number of leukocytes in the circulating blood, as distinguished from a relative increase (such as that observed in dehydration). (05 Mar 2000) |
| absolute oils | Essential oils that are obtained by the removal of insoluble compounds from concrete oils. (05 Mar 2000) |
| absolute pressure | Pressure measured with respect to zero pressure. Compare: gauge pressure. (05 Mar 2000) |
| absolute refractory period | The period following excitation when no response is possible regardless of the intensity of the stimulus. (05 Mar 2000) |