notch

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notch

 [noch]
an indentation, especially one on the edge of a bone or other organ; called also incisure.
aortic notch (dicrotic notch) a small downward deflection in the arterial pulse or pressure contour immediately following the closure of the semilunar valves, sometimes used as a marker for the end of systole or the ejection period.
parotid notch the notch between the ramus of the mandible and the mastoid process of the temporal bones.
Rivinus' notch (tympanic notch) a defect in the upper tympanic part of the temporal bone, filled by the upper portion of the tympanic membrane. Called also Rivinus' or tympanic incisure.

notch

(notch), [TA]
1. An indentation at the edge of any structure.
2. Any short, narrow, V-shaped deviation, whether positive or negative, in a linear tracing.
Synonym(s): incisura [TA], emargination, incisure
A precipitous drop in health care benefits for individuals or families despite a marginal increase in income, where those with earnings above the ‘notch’ do not qualify for certain health benefits

notch

(noch) [TA]
1. An indentation at the edge of any structure.
2. Any short, narrow, V-shaped deviation, whether positive or negative, in a linear tracing.
Synonym(s): incisura [TA] , incisure.

notch

(noch) [TA]
1. An indentation at the edge of any structure.
2. Any short, narrow, V-shaped deviation, whether positive or negative, in a linear tracing.