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

notch

(noch) incisure; an indentation on the edge of a bone or other organ.
aortic notch  dicrotic n.
cardiac notch 
1. (of stomach) a notch at the junction of the esophagus and the greater curvature of the stomach.
2. (of left lung) a notch in the anterior border of the left lung.
dicrotic notch  a small downward deflection in the arterial pulse or pressure contour immediately following the closure of the semilunar valves and preceding the dicrotic wave, sometimes used as a marker for the end of systole or the ejection period.
mastoid notch  a deep groove on the medial surface of the mastoid process of the temporal bone, giving attachment to the posterior belly of the digastric muscle.
parotid notch  the notch between the ramus of the mandible and the mastoid process of the temporal bone.
Rivinus' notch , tympanic notch a defect in the upper tympanic part of the temporal bone, filled by the upper portion of the tympanic membrane.

notch

Etymology: Fr, noche
an indentation or a depression in a bone or other organ, such as the auricular notch or the cardiac notch.
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.

notch,

n an indentation.
notch, buccal,
n the notch in the flange of a denture that accommodates the buccal frenum.
notch, coronoid
n greatest concavity on the anterior border of the ramus of the mandible.
notch, hamular,
n See notch, pterygomaxillary.
notch, labial,
n the notch in the labial flange of a maxillary or mandibular denture that accommodates the labial frenum.
notch, mandibular,
n a semicircular depression located on the mandible between the condyle and the coronoid process. Fibers arise from the anterior edge of the temporalis to form a distinct muscle, the temporalis minor, that inserts onto the mandibular notch.
notch, pterygomaxillary
n (hamular notch), the notch or fissure formed at the junction of the maxilla and the hamular, or pterygoid, process of the sphenoid bone.
notch, sigmoid,
n the concavity on the superior surface of the ramus of the mandible lying between the coronoid and condyloid processes.

notch

an indentation, especially one on the edge of a bone or other organ.

acetabular notch
in the medial part of the rim of the acetabulum.
antitragohelicine notch
in the caudal process of the cartilage of the pig's ear separating it from the tragus and antitragus.
aortic 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. Called also dicrotic notch.
cardiac notch
an indentation in the ventral margin of the lungs that allows the heart in its coverings to lie against the chest wall. Useful for ultrasound examination, auscultation, pericardiac and cardiac puncture. The extent of the notch varies between species and enlarges during expiration.
costal notch
indentations in the sternum with which the costal cartilages of the ribs articulate.
dicrotic notch
see aortic notch (above).
glenoid notch
in the cranial part of the rim of the glenoid cavity of the scapula.
greater sciatic notch
indentation in the dorsal edge of the ilium over which the sciatic nerve passes.
intertragic notch
the notch in the auricular cartilage between the tragus and antitragus.
lesser sciatic notch
indentation in the lateral border of the ischium between the ischial spine and the ischial tuber.
mandibular notch
separates the coronoid and condylar processes of the mandible.
mandibular vascular notch
the notch on the lower edge of the mandible below which facial vessels cross to reach the face in some species such as the horse.
nasoincisive notch
deep notch separating the pointed nasal bone and the incisive bone.
pretragic notch
the palpable depression rostral to the tragus of the ear.
tragohelicine notch
the slot in the auricular cartilage between the tragus and the medial border of the ear cartilage; a useful surgical landmark.
vertebral notch
the notch in the pedicle of the vertebral arch, at the cranial and caudal ends of each vertebra which combines with its opposite number to create an intervertebral foramen.
References in classic literature ?
The ball went hopping round the wheel until it began to settle through the notches.
At length the ball dropped off into one of the notches.
He prevailed on the groom to cut notches for him in the bark of the elm so that he could climb into the lower branches; and there he would sit watching the school door, and speculating on the possibility of turning the elm into a dwelling-place for himself and friends, after the manner of the Swiss Family Robinson.
That winter, at Dawson, Buck performed another exploit, not so heroic, perhaps, but one that put his name many notches higher on the totem-pole of Alaskan fame.
The little play of feature that his face presented, was cut deep into it, in a few hard curves that made it more like work; and he had certain notches in his forehead, which looked as though Nature had been about to touch them into sensibility or refinement, when she had impatiently thrown away the chisel, and said: 'I really cannot be worried to finish off this man; let him go as he is.
But if the notches in his forehead wouldn't fuse together, and if his face would work and couldn't play, what could he do, poor man!
The knife-edge backbone was deeply serrated, and into one of the notches both men disappeared.
Moody's cut of the rating one notch below investment grade in April was followed by Fitchs cut to three notches above speculative grade (S&P is four notches).
Recent observations indicate that it is more common to observe unilateral high-frequency notches than bilateral high-frequency notches [20-23].
Taipei's ranking this year climbed four notches to 36th place; in 2010, it stood at 41st place, or fifth place from the bottom.
said Thursday it has downgraded its long-term debt ratings on 15 major banks and securities firms with global capital market operations by one to three notches due to "significant exposure" to volatility against the backdrop of Europe's debt crisis.
NYSE: JPM) two notches from BAA2 from A3, Citigroup Inc.