| delusion of reference | A delusional idea that external events, etc., refer to the self. (05 Mar 2000) |
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| acoustic reference level | The biological reference level for sound measurements. When the term decibel is used to indicate the noise level, a reference quantity is implied; this reference value is usually expressed as a sound pressure of 20 micronewtons per square meter. The reference level is referred to as 0 decibels, the baseline of the scale of noise level's; this baseline is considered the weakest sound that can be heard by a person with very good hearing in an extremely quiet location. Other equivalent reference level's still being used include 0.0002 microbar and 0.0002 dyne per square centimeter. (05 Mar 2000) |
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| reference | The act of referring or consulting, something that refers to something else. (18 Nov 1997) |
| reference books | Books designed by the arrangement and treatment of their subject matter to be consulted for definite terms of information rather than to be read consecutively. Reference books include dictionaries, encyclopedias, atlases, etc. (12 Dec 1998) |
| reference books, medical | Books in the field of medicine intended primarily for consultation. (12 Dec 1998) |
| reference electrode | An electrode expected to have a constant potential, such as a calomel electrode, and used with another electrode to complete an electrical circuit through a solution; e.g., when a reference electrode is used with a glass electrode for pH measurement, changes in voltage between the two electrode's can be attributed to the effects of pH on the glass electrode alone. (05 Mar 2000) |
| reference method | An analytical procedure sufficiently free of random or systematic error to make it useful for validating proposed new analytical procedures for the same analyte. (05 Mar 2000) |
| reference standards | A basis of value established for the measure of quantity, weight, extent or quality, e.g. Weight standards, standard solutions, methods, techniques, and procedures used in diagnosis and therapy. (12 Dec 1998) |
| reference values | The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality. (12 Dec 1998) |
| grandiose delusion | A delusion in which one believes himself possessed of great wealth, intellect, importance and/or power, a common feature of schizophrenia. (27 Sep 1997) |
| physicians' desk reference | This thick volume the 1998 pdr runs 3,223 pages in length is a guide to all the prescription drugs available in the united states. Although not exactly redcommended fare for bedtime reading, the pdr is a key reference to the american pharmacopeia. It is available in many bookstores in the u.s. (12 Dec 1998) |
| planes of reference | Plane's which act as a guide to the location of other plane's. (05 Mar 2000) |
| hexaxial reference system | The figure resulting if the lines of derivation of the unipolar limb leads of the electrocardiogram are added to the triaxial reference system. (05 Mar 2000) |
| somatic delusion | A delusion having reference to a nonexistent lesion or alteration of some organ or part of the body; sometimes indistinguishable from hypochondriasis. (05 Mar 2000) |
| nihilistic delusion | A delusion in which one imagines that the world and all that relates to it have ceased to exist. Synonym: nihilistic delusion. (05 Mar 2000) |
| delusion | A false belief, seen most often in psychosis (for example schizophrenia). (27 Sep 1997) |