crest

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Related to iliac crest: inguinal ligament

crest,

in feudal livery, an ornament of the headpiece that afforded protection against a blow. The term is incorrectly used to mean family coat of arms. Crests were widely used in the 13th cent. by feudal chiefs, as they had been by ancient Greek warriors and the Roman centurions. The earlier forms were usually of stuffed leather, gilded, silvered, or painted; later they were of wood or metal. The crest came to be used in heraldryheraldry,
system in which inherited symbols, or devices, called charges are displayed on a shield, or escutcheon, for the purpose of identifying individuals or families.
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, first only by persons of high rank, then by all those entitled to a coat of arms. It surmounts the escutcheon; its colors are those of the coat of arms. The dragon, wivern, and plume of feathers are common crests. The lion, used by Edward III of England, remains the crest of the English sovereigns. See also blazonryblazonry
, science of describing or depicting armorial bearings. The introduction, since the Middle Ages, of artificial rules and fanciful medieval terms has complicated the science, particularly in England.
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Crest

Ornament on a roof, a roof screen or wall, which is frequently perforated, and consists of rhythmic and identical decorative patterns.

Crest

 

(1) A bony protrusion in vertebrates and man that increases the area for muscle attachment. For example, the skulls of many mammals have, on the occipital and parietal bones, crests whose size depends upon the degree of development of the attached musculature. The sternum of flying birds has a high thin crest called the carina, to which the pectoral muscles, which draw the wings downward, are attached.

(2) A fleshy growth (in English, also called the comb) at the top of the head in some birds (many gallinaceans and accipi-ters, such as the American black vulture). In breeds of domestic fowl the crest takes a variety of forms (foliate, rosaceous, or nutlike). Varieties of chicken with well-developed tufts usually have no comb (for example, the Dutch and Padua hens).

crest

[krest]
(design engineering)
The top of a screw thread.
(science and technology)
The highest point of a structure or natural formation, such as the top edge of a dam, the ridge of a roof, the highest point of a gravity wave, or the highest natural projection of a hill or mountain.

crest

crest, 2
1. A finial.
2. An ornament of a roof, a roof screen, wall, or aedicula, generally rhythmic and highly decorative, and frequently perforated; cresting.

crest

1. a tuft or growth of feathers, fur, or skin along the top of the heads of some birds, reptiles, and other animals
2. a ridge on the neck of a horse, dog, lion, etc.
3. the mane or hair growing from this ridge
4. a ridge along the surface of a bone
5. Archery identifying rings painted around an arrow shaft
References in periodicals archive ?
Actifuse was combined with BMA obtained from iliac crest, and fusion rates of 35% at 6 months postoperative and 77% at 24 months postoperative were reported.
In case of lateral transperitoneal approach, patient is placed in lateral decubitus position on a 60[degrees] to 80[degrees] angle and the operation table is flexed at patient's waist in order to create enough space between the ipsilateral costal margin and the iliac crest.
Between these two groups, attaching along the ridge of the iliac crest is the abdominal wall group of muscles and their fascia.
Other recommended investigations include an immunoglobulin assay, measurement of CA 125, Epstein-Barr virus testing, and MRI from the skull base to the iliac crest.
Repair of the large boney defect with free bone graft from the iliac crest was decided, as the remaining mandibular bone was thin and prone to fracture [Keller and Triplett, 1987; Boustred et al.
As in the case of the Doryphoros, one's attention is drawn to the very distinctive overhang of the iliac crest and the continuation of this ridge in a smooth and sinuous contour marking off the groin area from the upper thighs.
A hollow needle is placed through incisions made in the skin on both sides of the posterior iliac crest or pelvic bone.
A bone marrow biopsy from the iliac crest was performed to evaluate anemia.
Superior gluteal artery laceration as a complication of iliac crest bone graft surgery was first described by Kahn (3) in 1978.
The gold standard for bone grafting is autograft harvested from the iliac crest, but surgeons also can make use of chips of autologous bone collected at the time of another procedure.
1,2) Injury typically occurs at either the superior lumbar (Grynfeltt-Lesshaft) triangle, which is bordered by the 12th rib superiorly, erector spinae muscle posteriorly, and internal oblique muscle anteriorly; or the inferior lumbar (Petit's) triangle, which is bordered by the iliac crest inferiorly, external oblique muscle anteriorly, and latissimus dorsi muscle posteriorly.
More specifically the attachment to the iliac crest is depicted to be at the posterior iliac spines (Romanes, 1964; Sobotta, 1909; Williams et al.