| Haudek's niche | <radiology> An archaic term for the radiographic appearance in profile of contrast material filling a gastric ulcer in the wall of the stomach. (05 Mar 2000) |
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| niche | A cavity, hollow, or recess, generally within the thickness of a wall, for a statue, bust, or other erect ornament. Hence, any similar position, literal or figurative. "Images defended from the injuries of the weather by niches of stone wherein they are placed." (Evelun) Origin: F, fr. It. Nicchia, prop, a shell-like recess in a wall, fr. Nicchio a shellfish, mussel, fr. L. Mytilus. Source: Websters Dictionary (01 Mar 1998) |
| enamel niche | enamel crypt |