triangle

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triangle

 [tri´ang-g'l]
a three-cornered object, figure, or area, such as a delineated area on the surface of the body; called also trigone.
carotid triangle, inferior that between the median line of the neck in front, the sternocleidomastoid muscle, and the anterior belly of the omohyoid muscle.
carotid triangle, superior carotid trigone.
cephalic triangle one on the anteroposterior plane of the skull, between lines from the occiput to the forehead and to the chin, and from the chin to the forehead.
digastric triangle submandibular triangle.
Einthoven's triangle an imaginary equilateral triangle with the heart at its center, formed by the axes of the three bipolar limb leads.
Einthoven's triangle. Bipolar limb leads I, II, and III form Einthoven's triangle. Other standard positions for electrocardiographic leads are the augmented unipolar leads: aVR (right arm), aVL (left arm), and aVF (left leg). From Polaski and Tatro, 1996.
triangle of elbow a triangular area on the front of the elbow, bounded by the brachioradial muscle on the outside and the round pronator muscle inside, with the base toward the humerus.
triangle of election superior carotid triangle.
facial triangle a triangular area whose points are the basion and the alveolar and nasal points.
femoral triangle the area formed superiorly by the inguinal ligament, laterally by the sartorius muscle, and medially by the adductor longus muscle; called also Scarpa's triangle.
infraclavicular triangle that formed by the clavicle above, the upper border of the greater pectoral muscle on the inside, and the anterior border of the deltoid muscle on the outside.
inguinal triangle the triangular area bounded by the inner edge of the sartorius muscle, the inguinal ligament, and the outer edge of the long adductor muscle.
lumbocostoabdominal triangle that lying between the external oblique muscle of the abdomen, the posterior inferior serratus muscle, the erector muscle of the spine, and the internal oblique muscle of the abdomen.
occipital triangle the area bounded by the sternocleidomastoid muscle in front, the trapezius muscle behind, and the omohyoid muscle below.
Scarpa's triangle femoral triangle.
subclavian triangle a triangular area bounded by the clavicle, the sternocleidomastoid muscle, and the omohyoid muscle.
suboccipital triangle that lying between the posterior greater rectus muscle of the head and the superior and inferior oblique muscles of the head.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

tri·an·gle

(trī'ang-gĕl), [TA]
In anatomy and surgery, a three-sided area with arbitrary or natural boundaries.
See also: trigonum, region.
[L. triangulum, fr. tri-, three, + angulus, angle]
Farlex Partner Medical Dictionary © Farlex 2012

tri·an·gle

(trī'ang-gĕl) [TA]
anatomy, surgery A three-sided area with arbitrary or natural boundaries.
See also: trigonum, region
[L. triangulum, fr. tri-, three, + angulus, angle]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

tri·an·gle

(trī'ang-gĕl) [TA]
In anatomy and surgery, three-sided area with arbitrary or natural boundaries.
[L. triangulum, fr. tri-, three, + angulus, angle]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
In the smaller grid segments, the slip surface normal stress is assumed to be constant.
Repeatability testing of the molds all showed absolute errors between scans for the three mold pairs equivalent to or less than 0.01 mm for MRD, 0.04 mm for interquartile range, and 0.04[degrees] for mean surface normal angle difference.
The angular orientation of a flat surface is defined by the angle of the surface normal relative to some coordinate axes.
The advantages of RCLEDs over conventional LEDs include higher emission intensity emitted to the semiconductor surface, higher spectral purity, and an emission pattern directed toward the surface normal to the semiconductor.
At a distance of one ft, a standard candle produces one footcandle upon a surface normal to the beam.
In the initial stage of segmentation, considering that different leaves usually have different surface normals and the points on the same leaf surface usually have similar normals, we use region growing algorithm based on local surface normal and curvature to segment leaves [30].
The XRD used method was multiple exposure technique, which it is possible to obtain more precise determination of [phi] using more than two [phi] orientations and [phi] plotting the measured strain values for each [phi] orientation as function of [sen.sup.2][phi], where the psi ([phi]) is the angle between specimen surface normal (Ns) and the normal diffracting planes [4].
Experimental research of the MRP data page is based on thermal expansion of the page along its surface normal (page thickness) and on deformation analysis of all the surface of the structure simultaneously when one side of the page is being uniformly heated by a selected heat source and the results recorded by the method of two exposition holographic interferometry [11].
The tooth surface and the surface normal of generating rack are given by the following equations:
A computer-controlled stepper motor was used to control rotation of substrate about the substrate surface normal. The angle between the molecular flux incidence and the substrate normal was set to 75[degrees] and 0[degrees].
We determined local socket shape error by calculating the mean surface normal angle error (SNAE) between the test socket shape and the original socket shape.

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