| dental leakage | The seepage of fluids, debris, and micro-organisms between the walls of a prepared dental cavity and the restoration. (12 Dec 1998) |
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| artifact | Something artificial, a distortion that does not reflect normal anatomy or pathology, not usually found in the body. For example: in radiology, the appearance on an X-ray of a surgical metal clip that obscures the clear view of an anatomical structure. (16 Dec 1997) |
| chemical shift artifact | In magnetic resonance imaging, a dark band caused by a biochemical difference in resonant frequency of adjacent regions rather than a true anatomic separation. (05 Mar 2000) |
| spectral | 1. Of or pertaining to a specter; ghosty. "He that feels timid at the spectral form of evil is not the man to spread light." (F. W. Robertson) 2. <optics> Of or pertaining to the spectrum; made by the spectrum; as, spectral colours; spectral analysis. Spectral lemur. <zoology> See Tarsius. Source: Websters Dictionary (01 Mar 1998) |
| spectral sensitivity | The reciprocal of the amount of monochromatic radiation that produces a fixed response. (05 Mar 2000) |