niche (nich) a defect in an otherwise even surface, especially a depression or recess in the wall of a hollow organ, as seen in a radiograph, or such a depression in an organ visible to the naked eye.
niche
niche
enamel niche either of two depressions between the dental lamina and the developing tooth germ, one pointing distally (distal enamel n.) and the other mesially (mesial enamel n.) .
niche (n ch, n sh)n. 1. An eroded or ulcerated area detected by contrast radiography. 2. The function or position of an organism or population within an ecological community. 3. The particular area within a habitat occupied by an organism. |
niche
[nich]
Etymology: Fr, recess
a defect in an otherwise even surface, especially a depression or recess in the wall of an organ as seen on a radiograph or by the unaided eye.
niche
a small recess, depression or indentation, especially a recess in the wall of a hollow organ that tends to retain contrast media, as revealed by radiography.
ecological niche
the geographical location in the physical environment which the particular organism occupies best, in which it thrives best. The boundaries are determined by the suitability of the climate and the feed provided and competition with predators and collaboration with synergists.
niche pericarditis
an abattoir finding in normal cattle; small red velvety patches on the outside of the great vessels.
niche
Imaging A recess which may correspond to an ulcer in the wall of a hollow organ which tends to retain contrast medium
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