| objective circle | <microscopy> When the focused objective is examined by with- drawing the ocular and viewing its back focal plane through the microscope bodytube, the limiting boundary of the objective, the circumference of the white spot of light, is the objective circle. (05 Aug 1998) |
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| objective, fluorite | <microscopy> An objective using the mineral fluorite in its construction. It is usually intermediate between achromatic and apochromatic in correction, but may be more highly corrected. See: illumination, eyepiece. (05 Aug 1998) |
| objective optometer | <optics> A contrivance for exhibiting and measuring the refraction of light. Origin: Refraction. Source: Websters Dictionary (01 Mar 1998) |
| objective perimetry | Determination of the visual field by pupillary constriction, electroencephalography, or eye movements. (05 Mar 2000) |
| objective probability | A probability of an outcome based either on unassailable theory or extensive empirical experience of exactly the same combination of circumstances; the notion also implies that the realization concerned has not been effected and therefore even in principle not known with certainty. (05 Mar 2000) |
| objective psychology | Psychology as studied by observation of the behaviour and mental functions in others. (05 Mar 2000) |
| objective sensation | A sensation caused by a verifiable stimulus. Primary sensation, a sensation that is the direct result of a stimulus. Referred sensation, a sensation felt in one place in response to a stimulus applied in another. Synonym: reflex sensation, transferred sensation. (05 Mar 2000) |
| objective sign | <clinical sign> A sign that is evident to the examiner. (05 Mar 2000) |
| objective symptom | A symptom that is evident to the observer. (05 Mar 2000) |
| objective synonym | <zoology> Each of two or more different names applied to one and the same taxon based on the same type. See: Synonym. (09 Jan 1998) |
| environmental quality objective | This is a regulatory value defining the quality to be aimed for in a particular aspect of the environment. Unlike an environmental quality standard, an EQO is not usually expressed in quantitative terms and cannot be enforced legally. (09 Oct 1997) |
| fluorite objective | Microscope objective corrected for spherical and chromatic aberration at two wavelengths. Better than an ordinary objective corrected at one wavelength but inferior to (and much cheaper than) a planapochromatic objective. (18 Nov 1997) |